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The Daily Cosmos

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The Daily Cosmos

Cosmology
Astrophysics
Astronomy

Location: #science
Members: 56
Latest Activity: 4 hours ago

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

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Comment by Adriana on May 4, 2011 at 12:55pm
Comment by doone on April 24, 2011 at 6:34pm
Comment by Michel on April 24, 2011 at 3:05pm
This has just become my new wallpaper.
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.

 
 
 

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