Astronomy and Cosmology

3713 topics in this forum

1. What happened before the big bang?

   By Vexen, March 16, 2019
   • 7 replies
   • 1.1k views
   • 
   • Phi for All
   • March 16, 2019

2. What's the half life of dark matter?

   By Vexen, March 16, 2019
   • 5 replies
   • 1.1k views
   • 
   • Strange
   • March 16, 2019

3. A moon coverall to simulate Earth gravity on the Moon

   By harlock, March 8, 2019
   • 8 replies
   • 1.3k views
   • 
   • Carrock
   • March 13, 2019

4. Does it take an infinite time to reach the center of a black hole?

   By Vexen, March 4, 2019
   • 6 replies
   • 882 views
   • 
   • beecee
   • March 5, 2019

5. Is there an edge of space or is it infinite?

   By Vexen, March 4, 2019
   • 2 replies
   • 858 views
   • 
   • beecee
   • March 4, 2019

6. GAMMA RAY Burst and effect on Earth Life by Anmol Bihariya

   By Anmol Bihariya, March 4, 2019
   • 1 reply
   • 816 views
   • 
   • Vexen
   • March 4, 2019

7. Will the universe reatart itself?

   By Vexen, March 2, 2019
   • 2 replies
   • 677 views
   • 
   • Sensei
   • March 2, 2019

8. Does inflationary theory disprove the big bang theory?

   By Vexen, March 1, 2019
   • 2 replies
   • 705 views
   • 
   • Airbrush
   • March 2, 2019

9. Planet 9 and a 3 million years ago Stellar Flyby:

   By beecee, February 28, 2019
   • 0 replies
   • 601 views
   • 
   • beecee
   • February 28, 2019

10. Sunrise to sunset lapse... on the moon.

    By Externet, February 25, 2019
    • 3 replies
    • 823 views
    • 
    • Airbrush
    • February 28, 2019

11. Earth's Geocorona Goes Beyond the Moon

    By QuantumT, February 26, 2019
    • 3 replies
    • 670 views
    • 
    • QuantumT
    • February 26, 2019

12. Photons & Cosmic Expansion 1 2

    By QuantumT, February 21, 2019
    • 40 replies
    • 3.5k views
    • 
    • StringJunky
    • February 25, 2019

13. Hypervelocity Supermassive Black Hole 1 2

    By Airbrush, February 6, 2019
    • 32 replies
    • 3.3k views
    • 
    • swansont
    • February 22, 2019

14. Need help with density parameters of the LambdaCDM model 1 2

    By stephaneww, February 10, 2019
    • 28 replies
    • 2.4k views
    • 
    • stephaneww
    • February 18, 2019

15. Photon Fueled Cosmic Acceleration

    By QuantumT, February 16, 2019
    • 3 replies
    • 819 views
    • 
    • swansont
    • February 17, 2019

16. Key to the space exploration?

    By Jibbek, February 12, 2019
    • 2 replies
    • 714 views
    • 
    • beecee
    • February 12, 2019

17. Q about black holes (split from Black Hole Energy Distribution)

    By Airbrush, January 31, 2019
    • 15 replies
    • 1.2k views
    • 
    • Mordred
    • February 2, 2019

18. Exploring Titan

    By Gian, May 10, 2018
    • 4 replies
    • 1.6k views
    • 
    • MigL
    • February 2, 2019

19. How Did Uranus End Up On It's Side?

    By scienceafrique, January 25, 2019
    • 3 replies
    • 935 views
    • 
    • Airbrush
    • January 25, 2019

20. Flash on the during the Lunar eclipse - static discharge?

    By gfellow, January 23, 2019
    • 11 replies
    • 1.4k views
    • 
    • Janus
    • January 24, 2019

21. Could Black Holes be the hottest things in the Universe?

    By coderage9100, January 18, 2019
    • 16 replies
    • 2.1k views
    • 
    • Strange
    • January 20, 2019

22. Van de Graaff generator on the Moon

    By harlock, January 17, 2019
    • 5 replies
    • 907 views
    • 
    • Endy0816
    • January 18, 2019

23. Energy contained in the magnetic field 1 2

    By Danijel Gorupec, January 1, 2019
    • 36 replies
    • 3.4k views
    • 
    • Phi for All
    • January 15, 2019

24. Rocks falling into the sun

    By Edwina Lee, January 14, 2019
    • 1 reply
    • 831 views
    • 
    • mathematic
    • January 14, 2019

25. Exclusive: Grave doubts over LIGO’s discovery of gravitational waves

    By beecee, November 16, 2018
    • 19 replies
    • 3.1k views
    • 
    • beecee
    • January 13, 2019