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 Post subject: Re: Space Is Deep
PostPosted: Sun Jun 16, 2019 9:00 pm 
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The Moon is lopsided, which is probably the main reason why it shows the same face to the Earth. That lopsidedness is likely the result of a centrifugal force caused by the far side of the Moon being heavier than the near side.

But the Moon also wobbles. Over the course of an orbit, it oscillates back and forth, and up and down. It also gets closer and farther, due to the eccentricity of its orbit.

Here's how the Moon's appearance would change over an orbit, if it was full the entire time:

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 Post subject: Re: Space Is Deep
PostPosted: Sun Jun 16, 2019 10:51 pm 
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^^^^^ Excellent ^^^^^
"locally" we have a pseudo super moon going on right now.....very nice.....


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 Post subject: Re: Space Is Deep
PostPosted: Sun Jun 23, 2019 10:58 am 
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Total Solar Eclipse: 360 VR Video Seen From Space | Earth From Space | BBC Earth
https://www.youtube.com/watch?v=53PvDEkgbno


Get closer than ever to a total solar eclipse and observe it from all possible angles in this stunning virtual reality video. A collaboration with sentintospace.com

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 Post subject: Re: Space Is Deep
PostPosted: Sun Jun 23, 2019 6:04 pm 
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^^ :)

Loved the approaching shadow part!

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 Post subject: Re: Space Is Deep
PostPosted: Mon Jun 24, 2019 1:15 am 
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^^^^^ I love that stuff ^^^^^
Cheers Mr.GG


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 Post subject: Re: Space Is Deep
PostPosted: Mon Jun 24, 2019 7:47 am 
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^^^Cool beans... 8)


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 Post subject: Re: Space Is Deep
PostPosted: Mon Jun 24, 2019 4:03 pm 
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cory1984 wrote:
Massive Metal ‘Anomaly’ Detected 180 Miles Beneath The Surface Of The Moon

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 Post subject: Re: Space Is Deep
PostPosted: Wed Jun 26, 2019 3:04 am 
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^^^^^ hee hee hee ^^^^^

Māori are the native people of New Zealand

Matariki: Everything there is to know about it
Alistair Hughes·18:11, Jun 03 2016

The Maori new year festival begins with the first rising of Matariki (the Pleiades star cluster) today.

EYEING THE CROSS

Southern hemisphere skies offer dazzling spectacles for night viewing.

Image
Royal Astronomical Society of NZ
The Pleiades/Matariki cluster.

The most recognisable constellation (pattern of stars) in the sky is the Southern Cross (Crucis).

Who first depicted them as a cross is unknown, but they are first shown in this fashion on a celestial globe made in 1592. The cross would have been visible on the horizon of Jerusalem during the period in which the crucifixion took place.

Two bright stars on one side of the cross are often referred to as the Pointers, since the imaginary line joining them appears to point towards the constellation.

The brighter one, Alpha Centauri, is the closest star to our Sun.

Nestled against the Southern Cross is a dark cloud-like area, from which stars appear to be absent. Popularly known as the Coal Sack, it is a cloud of gas and dust obscuring the light from the more distant stars of the Milky Way, which silhouettes its outline.

MATARIKI OBSERVANCE (JUNE 6, 2016)

Matariki - Mata Riki (Tiny Eyes) or Mata Ariki (Eyes of God) - is the Maori name for the group of stars also known as the Pleiades star cluster or the Seven Sisters.

They are a group of young stars glowing in the gas and dust of the nebula from which they formed.

Matariki is the name for the traditional Maori new year. This is marked by the rise of Matariki and the sighting of the next new moon.

The pre-dawn rise of Matariki can be seen in the last few days of May every year and the new year is marked at the sighting of the next new moon which occurs during June.

Traditionally, depending on the visibility of Matariki, the coming season's crop was thought to be determined. The brighter the stars, the warmer the season would be, bringing a more productive crop.

WAY UP SOUTH

The constellations were named mostly by northern hemisphere observers, meaning that we see these star patterns from an 'upside-down viewpoint', which makes many of them difficult to identify.

An extremely easy constellation to recognise is Scorpius (the scorpion), a long, S-shaped star pattern located in the widest and brightest part of the Milky Way.

Image

A prominent orange-red star, Antares, represents the heart of the scorpion.

One of the largest stars, it is a red supergiant, and a nearby line of three stars represents the head and claw. On the other side of Antares, a line curving downwards is the scorpion's tail.

The Large & Small Magellanic Clouds (LMC and SMC) are easily seen by eye in a dark sky. They are two galaxies like our own, the Milky Way, but are both much smaller. They are also very close by galactic standards: LMC is 160,000 light years and SMC 200,000 light years away, each composed of billions of stars.

MATARIKI - A REPEATING PATTERN

The star cluster called Matariki has always been significant to many cultures all around the world.

In Greek mythology the Pleiades were the seven daughters of the titan Atlas and the sea-nymph Pleione.

Image
A 17,000-year-old painting in the Lascaux caves in France depicts the Matariki star cluster with Tautoru (the belt of Orion) on the top left of this image. (Photograph: REUTERS)

Zeus immortalised the sisters by placing them in the sky, forming the constellation known thereafter as the Pleiades.

The constellation is also known to the Aztecs (who called it Tianquiztli), the Maya (Tzab-ek), the Persians (Parveen/parvin), the Sioux and Cherokee of North America and the Chinese.

In India, this cluster is called the Krittika nakshatra, believed to be the six wives of the star Rishis of the Great Bear.

The Matariki star cluster is mentioned in Homer's Iliad and Odyssey, and three times in the Bible, including Amos 5:8 ("Seek him that maketh the seven stars and Orion...").

As the Krittika, it is particularly revered in Hindu mythology as the six mothers of the war god Skanda, who developed six faces, one for each of them.

Some scholars of Islam have suggested that it is also the Star in Najm which is mentioned in the Koran.

Japanese car maker Subaru derives its name from the Matariki cluster, which is represented by six stars within an oval for its corporate logo.

THE SHORTEST DAY

Image
The Earth's axial tilt of 23.5 degrees means that the southern and northern hemispheres each receive the greatest and least amount of sunlight at opposite times of the year as we orbit the Sun, giving us seasonal changes and solstices.

Winter solstice occurs on the shortest day and longest night of the year, when the Sun's maximum position in the sky is at its lowest. This marks the reversal of the gradual lengthening of darkness hours, bringing the return of longer days and an increase in light and warmth.

Interpretation of the event varies throughout the world, but most cultures celebrate a recognition of rebirth, involving festivals and rituals.

Maruaroa o Takurua occurs from June 20–22, and is seen by Maori as the middle of the winter season. It takes place after the rise of Matariki, marking the beginning of the new year, and is said to be the point at which the Sun turns from his northern journey to his winter-bride Hine-Takurua (Sirius) and begins his journey back to his summer-bride, Hine-Raumati.

In Maori myth, Hine-Takurua symbolises the gathering of fish and seafood from the ocean, while the return of the Sun to Hine-Raumati indicates the time for cultivation of the land.

FINDING MATARIKI


Image

✹ First, find Tautoru (the bottom three stars of 'the pot', also called Orion's belt), in the low northeast just before dawn.

✹ To the left of Tautoru, find the orange star, Taumata-kuku (Aldebaran).

✹ Follow an imaginary line from Tautoru, across to Taumata-kuku and keep going until you hit a small, bright cluster of stars. This is Matariki. In good viewing conditions you should be able to make out seven bluish stars.

MAORI ASTRONOMY

To Maori, the southern Milky Way is Te Waka o Tamarereti (the great waka (canoe) of Tamarereti).

Orion forms the stern, Scorpius is the prow and the Southern Cross and the Pointers are the anchor and rope.

At the time of the Maori new year, the great waka of Tamarereti can be seen in the south and contains all of the important navigational stars.

According to legend, when Tamarereti took his canoe out on to a lake, he found himself far from home as night was falling.

There were no stars at this time and in the darkness he was in danger from the taniwha (monster). So Tamarereti sailed his canoe along the river that emptied into the heavens (to cause rain) and scattered shiny pebbles from the lakeshore into the sky.

The sky god, Ranginui, was pleased by this and placed the waka into the sky as a monument to how the stars were made.

* Special thanks to: Vicki Irons, Education Programmes Officer, Carter Observatory.


Stuff


https://www.stuff.co.nz/science/8073938 ... w-about-it


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 Post subject: Re: Space Is Deep
PostPosted: Wed Jun 26, 2019 3:59 am 
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Gray_Ghost wrote:

Image
A 17,000-year-old painting in the Lascaux caves in France depicts the Matariki star cluster with Tautoru (the belt of Orion) on the top left of this image. (Photograph: REUTERS)

Zeus immortalised the sisters by placing them in the sky, forming the constellation known thereafter as the Pleiades.

The constellation is also known to the Aztecs (who called it Tianquiztli), the Maya (Tzab-ek), the Persians (Parveen/parvin), the Sioux and Cherokee of North America and the Chinese.

In India, this cluster is called the Krittika nakshatra, believed to be the six wives of the star Rishis of the Great Bear.

In Japanese it's the Subaru...that's why Subaru's have the star pattern emblem.

Gray_Ghost wrote:

THE SHORTEST DAY

Image
The Earth's axial tilt of 23.5 degrees means that the southern and northern hemispheres each receive the greatest and least amount of sunlight at opposite times of the year as we orbit the Sun, giving us seasonal changes and solstices.

Winter solstice occurs on the shortest day and longest night of the year, when the Sun's maximum position in the sky is at its lowest. This marks the reversal of the gradual lengthening of darkness hours, bringing the return of longer days and an increase in light and warmth.

Interpretation of the event varies throughout the world, but most cultures celebrate a recognition of rebirth, involving festivals and rituals.


I'm in denial about this whole tilt thing...it's summer up here now, and it's staying summer!


This is pretty cool(:
If the universe is only 14 billion years old, how can it be 92 billion light years wide?

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 Post subject: Re: Space Is Deep
PostPosted: Thu Jun 27, 2019 7:12 pm 
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There's also the issue of the changing distance of the Earth from the Sun. Its closest point on January 3rd is about 147.1 million kilometres and its farthest point is about 152.1 million kilometres. In January the southern hemisphere is titled towards the Sun and on top of that, the Sun is 5 million kilometres closer than it is in July, when the northern hemisphere is tilted towards the Sun. Summer in the southern hemisphere can be brutal.

Intensity of radiation is inversely proportional to the square of the distance, so, all else being equal, the sun actually seems 16% brighter in the sky in January than it does in July. But, in the northern hemisphere in January, the Earth is titled away from the Sun, which is low on the horizon and passing through more atmosphere at a low angle for less than 12 hours of the day (much less in places like southern England and Northern France where my genes come from - London has only roughly 8 hours daylight out of 24 in January), while in the southern hemisphere, like where I grew up from age five, in January, the sun is high in the sky and there are roughly 14 hours of daylight out of 24.

So, England gets the nasty sun in the middle of winter (with compensations) and Australia gets it in the middle of summer - it's unbearable. If you've ever wondered about why our skin cancer rates are the highest in the world, there's an explanation.

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 Post subject: Re: Space Is Deep
PostPosted: Fri Jun 28, 2019 7:00 pm 
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Click me :)
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 Post subject: Re: Space Is Deep
PostPosted: Tue Jul 02, 2019 10:24 am 
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FILE UNDER: VERY LUCKY GUY 8)

NASA sold moon landing footage to an intern for $218. Now, the tapes could sell for millions

Image

(CNN) On July 20, 1969, NASA put a man on the moon and captured it all on tape.

In 1976, the space agency unknowingly sold those tapes of original footage from the Apollo 11 lunar mission to a lucky intern who held onto them for decades. He never even knew their contents.

Now, NASA's blunder will belong to the highest bidder: the three surviving videotapes of the seminal moment in space exploration are up for auction--at a starting bid of $700,000.

According to Sotheby's, the tapes are worth up to $2 million. Bidding begins July 20, on the 50th anniversary of the moon landing.

The two-and-a-half hours of footage provide the sharpest image of the history-making mission ever recorded, from Neil Armstrong's first steps on the moon's surface to an interplanetary conversation with then-President Richard Nixon to the planting of the American flag.

The tapes, which could fetch millions at auction, feature NASA footage of the moment Neil Armstrong and Buzz Aldrin planted the American flag on the moon.

The tapes, which could fetch millions at auction, feature NASA footage of the moment Neil Armstrong and Buzz Aldrin planted the American flag on the moon.

The tapes were sold by accident to NASA intern Gary George in 1976, who purchased the set unknowingly among 65 boxes of videotapes at a government surplus auction for $217.77.

He resold most of the tapes to local TV stations for a profit but held onto three of them labeled "APOLLO 11 EVA | July 20, 1969 REEL 1 [-3]" at his father's suggestion, according to Sotheby's.

It's wise he did: an EVA, or extravehicular activity, is also known as a spacewalk, and his tapes captured the first lunar EVA.

More than 30 years later, after George heard NASA was trying to track down the footage for the moon landing's 40th anniversary, he took the unidentified tapes to a video archivist and viewed them for the first time.

It was then he realized he'd accidentally purchased the sharpest footage of the lunar landing ever recorded.

Whoever purchases the footage will join an exclusive club of viewers: George watched the tapes once more to digitize them and save them on a hard drive, which is included in the tapes' sale. Sotheby's staff viewed them once to assess their quality, which they found to be "faultless."

Still, it's unlikely the highest bidder will snag a bargain like George did.


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 Post subject: Re: Space Is Deep
PostPosted: Wed Jul 03, 2019 4:16 am 
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^^^^^ wasn't it directed by Alfred Hitchcock? ^^^^^


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 Post subject: Re: Space Is Deep
PostPosted: Wed Jul 03, 2019 4:45 am 
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 Post subject: Re: Space Is Deep
PostPosted: Thu Jul 18, 2019 12:26 pm 
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Bill Bramhall
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 Post subject: Re: Space Is Deep
PostPosted: Sat Jul 20, 2019 11:34 pm 
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The ISS in front of the Sun


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 Post subject: Re: Space Is Deep
PostPosted: Sun Jul 21, 2019 3:18 am 
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Asteroid cruised close to Earth on Friday
Friday, July 19, 2019 10:38PM EDT

An asteroid was expected to travel closely past the Earth on Friday, but according to data collected by the Center for Near Object Studies, this extraterrestrial tourist is only one of many.

The asteroid, called 2019 NJ2, is somewhere between 28 and 63 metres in diameter, and is travelling at 48,456 kilometres per hour, or 13.46 km per second.

The Center for Near Object Studies (CNEOS) tracks, as the name suggests, near-earth objects (NEOs, for short). A near-earth object is an asteroid or comet that will be passing close to the Earth’s orbit as it hurtles through space, tugged about by the gravitational pull of the planets and objects around it.

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https://www.ctvnews.ca/sci-tech/asteroid-cruised-close-to-earth-on-friday-1.4516013

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 Post subject: Re: Space Is Deep
PostPosted: Sun Jul 21, 2019 3:27 am 
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Gray_Ghost wrote:
Image

The ISS in front of the Sun



Are you sure ?
It looks like a TIE fighter to me !
:lol:

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 Post subject: Re: Space Is Deep
PostPosted: Thu Jul 25, 2019 8:30 pm 
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Today SpaceX launched the CRS-18 mission: a Falcon 9 rocket topped with a Dragon capsule, delivering supplies to the International Space Station.

As usual, the first stage returned to the launch site; which in this case was Cape Canaveral.

Here's the video of the flight. Liftoff is at about 15 minutes, and the landing of the first stage is at about 23 minutes...

https://www.youtube.com/watch?v=SlgrxVuP5jk

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 Post subject: Re: Space Is Deep
PostPosted: Fri Jul 26, 2019 4:16 pm 
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 Post subject: Re: Space Is Deep
PostPosted: Fri Jul 26, 2019 11:44 pm 
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Scientists almost didn't detect approach of 'city-killer asteroid'
Allyson Chiu·16:30, July 27th, 2019

Alan Duffy was confused. On Thursday, the astronomer's phone was suddenly flooded with calls from reporters wanting to know about a large asteroid that had just whizzed past Earth, and he couldn't figure out "why everyone was so alarmed".

"I thought everyone was getting worried about something we knew was coming," said Duffy, who is also lead scientist at the Royal Institution of Australia.

Forecasts had already predicted that a couple asteroids would be passing relatively close to Earth this week.

Then he looked up the details of the hunk of space rock named Asteroid 2019 OK.

"I was stunned," he said. "This was a true shock."

This asteroid wasn't one that scientists had been tracking and it had seemingly appeared from "out of nowhere", Michael Brown, a Melbourne-based observational astronomer, said.

According to data from NASA, the craggy rock was large, roughly 110 yards (101 metres) wide, and moving quickly along a path that brought it within about 45,360 miles (73,000 km) of Earth. That's about one-fifth of the distance to the moon and what Duffy considers "uncomfortably close".

"It snuck up on us pretty quickly," said Brown, an associate professor with Australia's Monash University's School of Physics and Astronomy. "People are only sort of realising what happened pretty much after it's already flung past us."

The asteroid's presence was discovered only earlier this week by separate astronomy teams in Brazil and the United States. Information about its size and path was announced just hours before it rocketed past Earth, Brown said.

"It shook me out my morning complacency," he said. "It's probably the largest asteroid to pass this close to Earth in quite a number of years."

THE ISSUE OF SIZE

So how did the event almost go unnoticed?

First, there's the issue of size, Duffy said. Asteroid 2019 OK is a sizable chunk of rock, but it's nowhere near as big as the ones capable of causing an event like the dinosaurs' extinction. More than 90 per cent of those asteroids, which are 1 kilometre, 0.62 miles, or larger, have already been identified by NASA and its partners.

"Nothing this size is easy to detect," Duffy said of the 110-yard-wide asteroid. "You're really relying on reflected sunlight, and even at closest approach it was barely visible with a pair of binoculars."

Image
GETTY IMAGES
Several dozen asteroids ranging from 6-12m fly close to Earth each year, but it's unusual for a rock the size of Asteroid 2019 OK to whizz past. (File photo)

Brown said the asteroid's "eccentric orbit" and speed were also likely factors in what made spotting it ahead of time challenging. Its "very elliptical orbit" takes it "from beyond Mars to within the orbit of Venus," which means the amount of time it spends near Earth where it is detectable isn't long, he said. As it approached Earth, the asteroid was travelling at about 15 miles per second, he said. By contrast, other recent asteroids that flew by Earth clocked in at between 2,5 and 12 miles per second.

"It's faint for a long time," Brown said of Asteroid 2019 OK. "With a week or two to go, it's getting bright enough to detect, but someone needs to look in the right spot. Once it's finally recognised then things happen quickly, but this thing's approaching quickly so we only sort of knew about it very soon before the flyby."

The last-minute detection is yet another sign of how much still remains unknown about space and a sobering reminder of the very real threat asteroids can pose, Duffy said.

"It should worry us all quite frankly," he said. "It's not a Hollywood movie. It is a clear and present danger."

'CITY KILLERS'

Duffy said astronomers have a nickname for the kind of space rock that just came so close to Earth: "city-killer asteroids." If the asteroid had struck Earth, most of it would have likely reached the ground resulting in devastating damage, Brown said.

"It would have gone off like a very large nuclear weapon" with enough force to destroy a city, he said. "Many megatons, perhaps in the ballpark of 10 megatons of TNT, so something not to be messed with."

In 2013 a significantly smaller meteor, about 22 yards across, broke up over the Russian city of Chelyabinsk and unleashed an intense shock wave that collapsed roofs, shattered windows and left about 1200 people injured. The last space rock to strike Earth similar in size to Asteroid 2019 OK was more than a century ago, Brown said. That asteroid, known as the Tunguska event, caused an explosion that levelled nearly 500,000 square acres of forest land in Siberia.

Though the chances of a large asteroid landing on a city are "modest", Brown said it is still worthwhile to devote resources toward detection and prevention. Brown said Asteroid 2019 OK proves there are "still dangerous asteroids out there that we don't know of" that "can arrive on our doorstep unannounced".

Scientists are working on developing at least two approaches to deflecting potentially harmful asteroids, Duffy said. One strategy involves gently pushing the asteroid slowly over time off its course and away from Earth, he said. The other, which he called a "very elegant solution", is the gravity tractor. If an asteroid is detected early enough, it could be possible to divert it using the gravity of a spacecraft, according to NASA.

People shouldn't try to "blast it with a nuke", Duffy said.

"It makes for a great Hollywood film," he said. "The challenge with a nuke is that it may or not work, but it would definitely make the asteroid radioactive."

TIME TO PREPARE?

In light of Asteroid 2019 OK, Duffy stressed the importance of investing in a "global dedicated approach" to detecting asteroids because "sooner or later there will be one with our name on it, it's just a matter of when not if".

"We don't have to go the way of the dinosaurs," he said. "We actually have the technology to find and deflect certainly these smaller asteroids if we commit to now."

Emily Lakdawalla, senior editor of the Planetary Society, which promotes space exploration, said the recent near miss is a reminder that "it's an important activity to be watching the skies". The more that can be learned about an asteroid, the better prepared people can be to prevent potential disasters, she said.

Still, Lakdawalla said that while the asteroid's close brush with Earth may have sparked some concern, "it is zero per cent danger to us".

"It's the kind of thing where you learn about something that you didn't know about, like things flying close by us, and your inclination is to be scared," she said. "But just like sharks in the ocean, they're really not going to hurt you and they're really fascinating to look at."


The Washington Post

https://www.stuff.co.nz/science/1145575 ... r-asteroid


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 Post subject: Re: Space Is Deep
PostPosted: Fri Aug 02, 2019 1:15 am 
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"A Cepheid variable (/ˈsɛfiːɪd, ˈsiːfiːɪd/) is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude."

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 Post subject: Re: Space Is Deep
PostPosted: Fri Aug 09, 2019 6:57 pm 
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Image credit: NASA/JPL

This false color photograph of Neptune was made from Voyager 2 images taken through three filters: blue, green, and a filter that passes light at a wavelength that is absorbed by methane gas. Thus, regions that appear white or bright red are those that reflect sunlight before it passes through a large quantity of methane.


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 Post subject: Re: Space Is Deep
PostPosted: Sat Aug 10, 2019 12:53 am 
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Gray_Ghost wrote:
This false color photograph of Neptune ...

Great. More fake news!

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 Post subject: Re: Space Is Deep
PostPosted: Sat Aug 10, 2019 5:01 am 
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Crashed spacecraft may have left tiny but tough creatures on the moon

https://www.cnn.com/2019/08/07/world/water-bear-space-intl-scli-scn/index.html

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