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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 Tuesday

 

Cosmology - Astrophysics - Astronomy

 

Hubble Wallpaper - Awesome Hubble Images

Discussion Forum

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

Started by May the Big Bang RIP. Last reply by May the Big Bang RIP Jul 23, 2017. 6 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 Adriana on September 24, 2011 at 10:26am

That video needs to get uploaded in the Video section. It's very good.

Comment by Neal on September 24, 2011 at 5:55am

Very cool animation.

Comment by Michel on September 23, 2011 at 11:37pm

Great animation. I'll be looking into his work.

Comment by Doone has Fremdschämen on September 23, 2011 at 5:14pm
Comment by Adriana on September 23, 2011 at 4:25pm

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2011 September 23
See Explanation. Clicking on the picture will download the highest resolution version available.

September's Aurora
Image Credit & Copyright: Yuichi Takasaka / TWAN / www.blue-moon.ca

Explanation: September's equinox arrives today at 0905 UT. As the Sun crosses the celestial equator heading south, spring begins in the southern hemisphere and autumn in the north. And though the seasonal connection is still puzzling, both spring and autumn bring an increase in geomagnetic storms. So as northern nights grow longer, the equinox also heralds the arrival of a good season for viewing aurora. Recorded earlier this month, these curtains of September's shimmering green light sprawl across a gorgeous night skyscape. In the foreground lies Hidden Lake Territorial Park near Yellowknife, Northwest Territories, Canada. Calm water reflects the aurora, with bright star trails peering through the mesmerizing sky glow. Of course, shining at altitudes of 100 kilometers or so, planet Earth's auroras are visible from space.

Comment by Michel on September 22, 2011 at 10:48am

Stars sure don't look like they used to =)

Comment by Neal on September 22, 2011 at 4:31am

Comment by Jaume on September 20, 2011 at 5:58pm

Ever see the ST Voyager episode where Lt. Paris goest to warp at the speed of light, and he evolves into another being?

Heh - no. Even though I know a bit of Star Trek lore (redshirts, "beam me up, Scotty" and stuff like that), I got it all from discussion boards.  I've never actually seen an episode of it.

Comment by A Former Member on September 20, 2011 at 4:02pm

(which is the same thing as saying they move through time at zero speed.)

 

Well, I think that that is what I was trying to say when I said their experience of time would be infinitely slow, which means not at all, really. Since nothing but space itself can move faster than light, there wouldn't be much to be consciously aware of.

 

It would follow that, from a photon's POV, everything happens at the same moment.

 

Ever see the ST Voyager episode where Lt. Paris goest to warp at the speed of light, and he evolves into another being? Sounds interesting, but it was kind of bad.

Comment by Jaume on September 20, 2011 at 3:21pm

If we really move through time at the speed or light (and even if we don't), it'd actually make sense for photons to not exist in time at all (which is the same thing as saying they move through time at zero speed.) It would follow that, from a photon's POV, everything happens at the same moment. At least, everything that happens between the moment they're emitted and the moment they're absorbed. (It'd be interesting to hear a conscious photon and a Tralfamadorian arguing with each other about time.)

By the way, that'd be a great way for humankind to expand in the universe: forget the huge vessels, just convert the crew into photon beams and convert them back on arrival. Instant travel (at least from the travellers' point of view), and no spacesickness! You'd just have to check the weather report before, or interstellar dust clouds might spoil your journey.

 
 
 

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