Astronomy and Cosmology

3705 topics in this forum

1. Interference vs. Lensing 1 2

   By AbnormallyHonest, September 11, 2017
   • 42 replies
   • 4.6k views
   • 
   • John Cuthber
   • September 20, 2017

2. Shoemaker Levy comet explosion

   By Elite Engineer, September 19, 2017
   • 6 replies
   • 1.2k views
   • 
   • Mordred
   • September 20, 2017

3. Worth of the sun?

   By Encryptor, September 11, 2017
   • 17 replies
   • 2.4k views
   • 
   • Encryptor
   • September 18, 2017

4. The Big Bang Theory, Expansion/Inflation plus "Explosion" 1 2

   By geordief, September 9, 2017
   • 28 replies
   • 3k views
   • 
   • Area54
   • September 13, 2017

5. sound in space 1 2

   By maitri, August 26, 2017
   • 30 replies
   • 3.1k views
   • 
   • mistermack
   • September 13, 2017

6. What do you think of this possible explanation of the red staining seen on Europa and a possible test for life on Europa?

   By gedsaz, September 12, 2017
   • 1 reply
   • 768 views
   • 
   • beecee
   • September 13, 2017

7. Accelerating Expansion of the Universe?

   By Cosmo_Ken, September 1, 2017
   • 14 replies
   • 2.2k views
   • 
   • Mordred
   • September 8, 2017

8. 15 days of darkness

   By Ixquehte, August 22, 2017
   • 7 replies
   • 1.2k views
   • 
   • Janus
   • August 24, 2017

9. An Idea That I Have

   By alexcouch, August 13, 2017
   • 10 replies
   • 1.8k views
   • 
   • Airbrush
   • August 22, 2017

10. Solar eclipse: why the shadow goes that way

    By Counterintuitive, August 19, 2017
    • 0 replies
    • 1.2k views
    • 
    • Counterintuitive
    • August 19, 2017

11. Exomoons and the mass of exoplanets

    By Ed Joyce, March 26, 2012
    • 15 replies
    • 3.2k views
    • 
    • Ed Joyce
    • August 14, 2017

12. An arxiv paper: A layman's explanation needed.

    By beecee, August 10, 2017
    • 4 replies
    • 939 views
    • 
    • Mordred
    • August 12, 2017

13. 40TH Anniversary: NASAs Longest and Farthest.

    By beecee, August 4, 2017
    • 10 replies
    • 1.3k views
    • 
    • beecee
    • August 11, 2017

14. New Instrumentation and Gravitational Radiation.

    By beecee, July 17, 2017
    • 6 replies
    • 1.2k views
    • 
    • Mordred
    • August 11, 2017

15. Anti-Gravity??

    By NishanC, August 4, 2017
    • 9 replies
    • 2.2k views
    • 
    • MigL
    • August 10, 2017

16. How reliable are estimates of asteroid mineral content?

    By Ken Fabian, August 6, 2017
    • 8 replies
    • 1.4k views
    • 
    • Mordred
    • August 9, 2017

17. Transuranic elements in a star

    By Moontanman, July 21, 2017
    • 19 replies
    • 4.6k views
    • 
    • Area54
    • August 1, 2017

18. Moon Explosion and Radiation (For Sci-Fi Book)

    By Mr Ask, July 20, 2017
    • 20 replies
    • 2.3k views
    • 
    • Damateur
    • July 30, 2017

19. The Big Bang and the Sun

    By dordle-loddle, July 30, 2017
    • 4 replies
    • 1.4k views
    • 
    • beecee
    • July 30, 2017

20. Delta Aquarids

    By imatfaal, July 28, 2017
    • 0 replies
    • 1.1k views
    • 
    • imatfaal
    • July 28, 2017

21. Would tidally locking Venus freeze the CO2 on the dark side?

    By Eclipse, July 23, 2017
    • 2 replies
    • 1k views
    • 
    • Area54
    • July 26, 2017

22. What is the energy of the Universe?

    By Eren, July 25, 2017
    • 2 replies
    • 854 views
    • 
    • Mordred
    • July 26, 2017

23. Heavy radioactive elements in a star

    By Moontanman, April 7, 2017
    • 3 replies
    • 1.5k views
    • 
    • Moontanman
    • July 23, 2017

24. Aren't planets have orbit because of centrifugal force?

    By Eren, July 19, 2017
    • 7 replies
    • 1.3k views
    • 
    • swansont
    • July 19, 2017

25. Einstein or me?

    By Tub, July 18, 2017
    • 7 replies
    • 1.2k views
    • 
    • StringJunky
    • July 19, 2017