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Message 10464 - Posted: 21 Mar 2012, 2:57:55 UTC

Of all the planets in the solar system, Saturn would be the only one that would float on water.

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Message 10470 - Posted: 22 Mar 2012, 2:03:13 UTC - in response to Message 10464.

Every second, the Sun burns 600 million tons of Hydrogen.

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Message 10480 - Posted: 23 Mar 2012, 0:28:25 UTC - in response to Message 10470.
Last modified: 23 Mar 2012, 0:28:47 UTC

In 12,000 years, Vega will become our new north star. Our current north star is Polaris.

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Message 10488 - Posted: 24 Mar 2012, 19:24:16 UTC - in response to Message 10480.

At the center of the Milky Way Galaxy, there is a black hole millions of times the mass of the most massive object in the solar system, the Sun.

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Message 10495 - Posted: 26 Mar 2012, 1:35:39 UTC - in response to Message 10488.

There are pulsars that rotate at a rate of several hundred times per second!

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Message 10542 - Posted: 30 Mar 2012, 20:03:30 UTC - in response to Message 10495.

Of all the planets in the Solar System, Earth is the only one that has plate tectonics!

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Message 10545 - Posted: 1 Apr 2012, 0:06:28 UTC - in response to Message 10542.
Last modified: 1 Apr 2012, 0:06:49 UTC

Travelling even as fast as a photon (about three hundred million meters per seconds), one would need more than four years to reach the nearest star to the sun, Proxima Centauri

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Message 10551 - Posted: 1 Apr 2012, 8:17:00 UTC - in response to Message 10545.

Although Mercury is the closest planet to the sun, temperatures on its surface reach -280 degrees Fahrenheit ( -173 degrees Celsius) at night. This is a consequence of the fact that Mercury has almost no atmosphere to trap heat.


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Message 10565 - Posted: 2 Apr 2012, 20:13:33 UTC - in response to Message 10551.

What we detect today as Cosmic Microwave Radiation started travelling towards us over 13 billion years ago.

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Message 10567 - Posted: 2 Apr 2012, 21:32:05 UTC - in response to Message 10565.

The Planets sing :-)

http://www.youtube.com/watch?v=n7E_GVDdyYs

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Message 10570 - Posted: 3 Apr 2012, 18:10:24 UTC - in response to Message 10567.

At the center of our galaxy, The Milky Way, there is a black hole that is millions of times more massive than the sun.

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Message 10574 - Posted: 3 Apr 2012, 18:45:19 UTC - in response to Message 10570.

Psst, Faik.
Look at message 10488 within this thread ;-)

Maybe of interest, the milkyway-Blackhole obviously is a little bit starving. Thats because there is very "few" matter within its reach. Okay, its a cosmic "few".

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Message 10580 - Posted: 3 Apr 2012, 23:31:13 UTC - in response to Message 10574.

Psst, Faik.
Look at message 10488 within this thread ;-)

Maybe of interest, the milkyway-Blackhole obviously is a little bit starving. Thats because there is very "few" matter within its reach. Okay, its a cosmic "few".


You are right, Dennis :)

I wonder if black holes give their meals names like "Kentucky fried stars", etc.?

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Message 10588 - Posted: 4 Apr 2012, 6:37:34 UTC

Who knows?
What's for sure is, that because of the higher concentration of carbon matter in the center, one of those popular "low carb" diets would be a very difficult task for our fat black hole.

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Message 10589 - Posted: 4 Apr 2012, 7:42:07 UTC - in response to Message 10588.
Last modified: 4 Apr 2012, 7:42:32 UTC

Hello Dennis,

Active galactic nuclei is a fascinating subject! I will put something together and post it on one of the threads soon.

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Message 10593 - Posted: 4 Apr 2012, 21:56:00 UTC - in response to Message 10589.
Last modified: 4 Apr 2012, 22:10:14 UTC

On the moon, a person would weigh 1/6 of what they would weigh here on Earth.

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Message 10609 - Posted: 5 Apr 2012, 19:44:39 UTC - in response to Message 10593.

Quasars are the most luminous objects in the universe!

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Message 10649 - Posted: 7 Apr 2012, 21:42:05 UTC - in response to Message 10609.

Temperatures on the surface of Mercury reach levels as high as 430 degrees Celsius (840 degrees F) and levels as low as -170 degrees Celsius (-250 degrees F).

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Message 10656 - Posted: 8 Apr 2012, 17:39:16 UTC - in response to Message 10649.

Neutron stars are extremely dense objects. They are so dense that a single soup can full of their material would contain more mass than that of the entire moon.

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Message 10685 - Posted: 10 Apr 2012, 12:19:49 UTC - in response to Message 10656.

As a result to the Greenhouse Effect, Venus has the hottest surface temperature for any planet in the solar system.

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Message boards : Cosmology and Astronomy : Fun Astronomy/Cosmology Facts