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: 129 Views: 34,449	Last Post By ricci70 November 2nd, 2013, 08:36 AM
Sticky: The basis of modern cosmology Started by DrRocket, January 4th, 2011 01:05 AM	Replies: 25 Views: 13,147	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: 24,634	Last Post By Dishmaster November 15th, 2008, 01:28 PM

Challenge to cosmology Started by ox, June 12th, 2021 06:29 AM	Replies: 1 Views: 69	Last Post By Double Helix June 12th, 2021, 11:59 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: 8 Views: 612	Last Post By Double Helix June 10th, 2021, 04:45 PM
Can we remake plastic waste into rocket fuel? Started by bearnard bale66, May 18th, 2021 06:43 AM	Replies: 6 Views: 325	Last Post By bearnard bale66 June 3rd, 2021, 09:30 AM
Maybe Einstein was wrong Started by ox, May 29th, 2021 07:28 AM	Replies: 4 Views: 203	Last Post By ox June 2nd, 2021, 06:13 AM
Gaia galaxy Started by ox, May 18th, 2021 07:02 AM	Replies: 1 Views: 220	Last Post By Double Helix May 18th, 2021, 05:15 PM
3D printer for some space stuff Started by bearnard bale66, May 14th, 2021 09:31 AM	Replies: 3 Views: 230	Last Post By bearnard bale66 May 18th, 2021, 05:28 AM
Moved: The essence of GR is to describe the gravity under the influence of gravitational waves Started by Tony2021, May 17th, 2021 07:21 PM	Replies: - Views: -
Do you believe in possibility of life in other galaxies? Started by bearnard bale66, March 24th, 2021 10:01 AM	Replies: 11 Views: 975	Last Post By Double Helix May 14th, 2021, 06:39 PM
Space debris Started by keeseguy, April 7th, 2021 04:44 PM	Replies: 1 Views: 438	Last Post By Double Helix April 7th, 2021, 07:32 PM
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: 0 Views: 415	Last Post By Double Helix April 5th, 2021, 08:03 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: 496	Last Post By Double Helix March 26th, 2021, 03:03 PM
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: 4 Views: 930	Last Post By Double Helix March 17th, 2021, 07:39 PM
The most advanced private space company of the present time Started by bearnard bale66, March 1st, 2021 09:37 AM	Replies: 3 Views: 718	Last Post By bearnard bale66 March 10th, 2021, 03:31 AM
The most important issue to be solved in space exploration Started by bearnard bale66, March 9th, 2021 09:32 AM	Replies: 0 Views: 569	Last Post By bearnard bale66 March 9th, 2021, 09:32 AM
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: 620	Last Post By bearnard bale66 March 3rd, 2021, 04:43 AM
Space technology that can help us save our environment Started by bearnard bale66, February 16th, 2021 09:04 AM	Replies: 3 Views: 782	Last Post By bearnard bale66 February 23rd, 2021, 04:12 AM
Space junk Started by bearnard bale66, February 11th, 2021 03:06 AM	Replies: 8 Views: 725	Last Post By bearnard bale66 February 16th, 2021, 07:19 AM
Nearly 164 UFO Sightings Reported in Idaho in 2020! Started by DavidLambert, February 11th, 2021 07:36 PM	Replies: 2 Views: 683	Last Post By Double Helix February 12th, 2021, 01:07 PM
Unobservable Universe Will Come Into View (eventually) Started by zinjanthropos, December 18th, 2020 12:50 PM	Replies: 36 Views: 1,331	Last Post By Dywyddyr February 12th, 2021, 03:59 AM
spacecraft that can be used for microgravity missions and experiments Started by bearnard bale66, February 8th, 2021 07:19 AM	Replies: 0 Views: 679	Last Post By bearnard bale66 February 8th, 2021, 07:19 AM