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The Daily Cosmos or Interesting Facts about the Universe

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The Daily Cosmos or Interesting Facts about the Universe

Cosmology
Astrophysics
Astronomy

Location: #science
Members: 58
Latest Activity: on Thursday

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

Discussion Forum

Big Bangers' Imaginations Supply Their Story's Only Support.

Started by Tom Sarbeck. Last reply by Joey Daniel Smith Dec 22, 2018. 7 Replies

'Hot Jupiter'

Started by Mrs.B. Last reply by Mrs.B Apr 9, 2016. 7 Replies

NASA's Solomon's Choice.

Started by Davy Oct 3, 2013. 0 Replies

This is Science at Work.

Started by Davy. Last reply by Davy Aug 15, 2013. 1 Reply

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Comment by Doone on April 24, 2011 at 8:26am

See Explanation. Clicking on the picture will download the highest resolution version available.

The Cat's Eye Nebula from Hubble 
Credit: NASAESAHEIC, and The Hubble Heritage Team (STScI/AURA)

Explanation: Staring across interstellar space, the alluring Cat's Eye nebula lies three thousand light-years from Earth. A classic planetary nebula, the Cat's Eye (NGC 6543) represents a final, brief yet glorious phase in the life of a sun-like star. This nebula's dying central star may have produced the simple, outer pattern of dusty concentric shells by shrugging off outer layers in a series of regular convulsions. But the formation of the beautiful, more complex inner structures is not well understood. Seen so clearly in this sharp Hubble Space Telescope image, the truly cosmic eye is over half a light-year across. Of course, gazing into the Cat's Eye, astronomers may well be seeing the fate of our sun, destined to enter its own planetary nebula phase of evolution ... in about 5 billion years.

Comment by Doone on April 23, 2011 at 12:14am

See Explanation. Clicking on the picture will download the highest resolution version available.

Shadows at the Lunar South Pole 
Credit: NASA / GSFC / Arizona State Univ. / Lunar Reconnaissance Orbiter

Explanation: What is it? It's a multi-temporal illumination map, of course. To make it, the wide angle camera on the Lunar Reconnaissance Orbiter spacecraft collected 1,700 images over a period of 6 lunar days (6 Earth months), repeatedly covering an area centered on the Moon's south pole. Converted to binary values (shadowed pixels set to 0, illuminated pixels set to 1) the images were stacked to produce a map representing the percentage of time each spot on the surface was illuminated by the Sun. Remaining convincingly in shadow, the floor of the 19 kilometer diameter Shackleton crater is seen near the center of the map. The lunar south pole itself is at about 9 o'clock on the crater's rim. Since the Moon's axis of rotation stays almost perpendicular to the ecliptic plane, crater floors near the lunar south and north poles can remain in permanent shadow and mountain tops in nearly continuous sunlight. Useful to future outposts, the shadowed crater floors could offer reservoirs of water ice, and the sunlit mountain tops ideal locations for solar power arrays.

Comment by Michel on April 22, 2011 at 6:31pm
There's some exposure magic going on on these films.
Comment by Adriana on April 22, 2011 at 4:49pm

Another fabulous time-lapse video of the night sky: a South Dakota field.

"Orion" - motion controlled night timelapse from Randy Halverson on Vimeo.

 

Comment by Adriana on April 22, 2011 at 12:55pm
It needs to be seen in full screen, HD, I'm lucky I can do that from my computer. I grew up in the Southern Hemisphere, the night skies are something else over there :-)
Comment by Michel on April 22, 2011 at 12:21pm

@Adriana - This is the best time-lapse of the Milky Way I've ever seen! And it sort of fulfills my dream of seing the night skies of the southern hemisphere.

Thnx.

Comment by Adriana on April 22, 2011 at 10:03am

The gorgeous night-sky time lapse animations keep on coming: this one, using images by Colin Legg, shows the sky over the Australian Outback.

WALU NGALINDI from GRANT WAKEFIELD on Vimeo.

WALU NGALINDI from GRANT WAKEFIELD on Vimeo.

Comment by Doone on April 21, 2011 at 4:46pm
@michel = does your last video work?
Comment by Doone on April 21, 2011 at 4:45pm

See Explanation. Clicking on the picture will download the highest resolution version available.

Peculiar Galaxies of Arp 273 
Credit: NASAESA, and the Hubble Heritage Team (STScI / AURA)

Explanation: The spiky stars in the foreground of this sharp cosmic portrait are well within our own Milky Way Galaxy. The two eye-catching galaxies lie far beyond the Milky Way, at a distance of over 300 million light-years. Their distorted appearance is due to gravitational tides as the pair engage in close encounters. Cataloged as Arp 273 (also as UGC 1810), the galaxies do look peculiar, but interacting galaxies are now understood to be common in the universe. In fact, the nearby large spiral Andromeda Galaxy is known to be some 2 million light-years away and approaching the Milky Way. Arp 273 may offer an analog of their far future encounter. Repeated galaxy encounters on acosmic timescale can ultimately result in a merger into a single galaxy of stars. From our perspective, the bright cores of the Arp 273 galaxies are separated by only a little over 100,000 light-years. The release of this stunning vista celebrates the 21st anniversary of the Hubble Space Telescope in orbit.

Comment by Michel on April 21, 2011 at 11:02am
 
 
 

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