Forum: Astronomy & Cosmology

The scientific study of matter in outer space and the astrophysical study of the history, structure, and constituent dynamics of the universe..

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Sticky: Interesting astronomical events and observing tips Started by ricci70, October 20th, 2008 04:23 AM 2 Pages • 1 2	Replies: 131 Views: 35,939	Last Post By Paleoichneum August 28th, 2021, 01:56 PM
Sticky: The basis of modern cosmology Started by DrRocket, January 4th, 2011 01:05 AM	Replies: 25 Views: 13,814	Last Post By Dishmaster September 20th, 2011, 05:34 PM
Sticky: Rules on homework help - READ THIS BEFORE POSTING OR HELPING Started by Dishmaster, November 15th, 2008 01:28 PM	Replies: 0 Views: 25,286	Last Post By Dishmaster November 15th, 2008, 01:28 PM

Today morning 3:20 a star has been hidden Started by Yusef, September 7th, 2021 05:01 AM	Replies: 11 Views: 280	Last Post By Yusef September 17th, 2021, 01:45 PM
Space debris Started by keeseguy, April 7th, 2021 04:44 PM	Replies: 2 Views: 1,002	Last Post By Mary Ford September 6th, 2021, 09:21 AM
Maybe Einstein was wrong Started by ox, May 29th, 2021 07:28 AM	Replies: 5 Views: 781	Last Post By Mary Ford September 6th, 2021, 09:05 AM
Challenge to cosmology Started by ox, June 12th, 2021 06:29 AM	Replies: 2 Views: 702	Last Post By Mary Ford September 6th, 2021, 09:01 AM
The Hubble Constant -Is it best derived from the CMB? Or by optical telescopes with distance ladders and quasars. etc.? Started by Double Helix, April 5th, 2021 08:03 PM	Replies: 1 Views: 968	Last Post By Mary Ford September 6th, 2021, 08:56 AM
End of Universe situation Started by Bakkerbaard, August 29th, 2021 06:32 PM	Replies: 4 Views: 275	Last Post By Double Helix September 1st, 2021, 03:15 PM
3D printer for some space stuff Started by bearnard bale66, May 14th, 2021 09:31 AM	Replies: 4 Views: 804	Last Post By Mary Ford August 26th, 2021, 02:34 AM
An Ocean, and Rivers on Mars?! Possible loss by photodissociation and impact of life on the surface. Started by Double Helix, March 16th, 2021 02:54 PM	Replies: 9 Views: 1,168	Last Post By Mary Ford August 26th, 2021, 02:29 AM
Do you believe in possibility of life in other galaxies? Started by bearnard bale66, March 24th, 2021 10:01 AM	Replies: 15 Views: 1,646	Last Post By Mary Ford August 26th, 2021, 02:17 AM
The most advanced private space company of the present time Started by bearnard bale66, March 1st, 2021 09:37 AM	Replies: 5 Views: 1,316	Last Post By Mary Ford August 26th, 2021, 02:11 AM
The most important issue to be solved in space exploration Started by bearnard bale66, March 9th, 2021 09:32 AM	Replies: 7 Views: 1,183	Last Post By Mary Ford August 26th, 2021, 01:47 AM
Merging Monsters: Black holes and neutron stars! Started by Double Helix, June 30th, 2021 07:37 PM	Replies: 4 Views: 551	Last Post By dark_matter25275 August 17th, 2021, 09:53 AM
Are Black Holes Giant Dark Energy Stars-Chapline & Laugh Started by CAW, February 1st, 2007 11:05 AM	Replies: 2 Views: 1,648	Last Post By dark_matter25275 August 16th, 2021, 12:51 PM
PROXIMA CENTUARI AND centuari A and centuari B Started by ASUTOSHJHA, July 29th, 2021 03:26 AM	Replies: 3 Views: 462	Last Post By bearnard bale66 August 5th, 2021, 03:35 AM
Earth's Magnetic Field. Does it persist today from one or more large impacts, or something else? Started by Double Helix, January 27th, 2021 01:29 PM	Replies: 5 Views: 1,499	Last Post By ASUTOSHJHA July 28th, 2021, 03:53 PM
The Cosmic Dawn - When the first stars were formed after the Big Bang! Started by Double Helix, June 24th, 2021 05:26 PM	Replies: 7 Views: 827	Last Post By ox July 6th, 2021, 06:16 AM
Can we remake plastic waste into rocket fuel? Started by bearnard bale66, May 18th, 2021 06:43 AM	Replies: 6 Views: 872	Last Post By bearnard bale66 June 3rd, 2021, 09:30 AM
Gaia galaxy Started by ox, May 18th, 2021 07:02 AM	Replies: 1 Views: 751	Last Post By Double Helix May 18th, 2021, 05:15 PM
M87's Super Massive Black Hole : New radio telescope data reveal magnetic fields with exceptional resolution! Started by Double Helix, March 26th, 2021 03:03 PM	Replies: 0 Views: 1,024	Last Post By Double Helix March 26th, 2021, 03:03 PM
New exoplanet candidate found in the habitable zone of the closest star system Started by SciForerer, February 28th, 2021 09:52 AM	Replies: 3 Views: 1,101	Last Post By bearnard bale66 March 3rd, 2021, 04:43 AM