Astronomy and Cosmology

3467 topics in this forum

1. Astronomy links 1 2 3 4 5

   By Martin, May 24, 2004
   • 103 replies
   • 89839 views
   • 
   • paulsutton
   • August 3

2. Cosmological Principle 1 2 3

   By Mordred, May 30, 2015
   • 52 replies
   • 28307 views
   • 
   • michel123456
   • June 22

3. Cosmo Basics

   By Martin, October 19, 2008
   • 13 replies
   • 24276 views
   • 
   • swansont
   • August 3, 2018

4. Using BOINC / seti@home?

   By Sayonara, August 29, 2010
   • 10 replies
   • 17784 views
   • 
   • Altruist1
   • March 26, 2016

5. Hypothetical sci-fi question about wormholes and elapsed time between the 2 points

   By Pmfr, Thursday at 05:53 PM
   • 6 replies
   • 119 views
   • 
   • Pmfr
   • 15 hours ago

6. how much of the outer universe can we see from where we are?

   By boo, October 21
   • 13 replies
   • 299 views
   • 
   • boo
   • Thursday at 10:56 PM

7. if there was a rogue black hole hurtling towards us would we know?

   By boo, October 23
   • 2 replies
   • 132 views
   • 
   • MigL
   • October 24

8. Is there the proof of heliocentrism? 1 2

   By molbol2000, October 18
   • 30 replies
   • 19141 views
   • 
   • CharonY
   • October 19

9. How do concentrations of dark matter arise? 1 2

   By Eise, October 1, 2019
   • 48 replies
   • 24674 views
   • 
   • swansont
   • October 15

10. Gravity of a black hole (split from How large would a black hole need to be to overcome inflation and pull all matter one day into a big crunch?

    By Charles 3781, October 12
    • 9 replies
    • 200 views
    • 
    • Markus Hanke
    • October 15

11. Black Holes and Penrose's CCC

    By geordief, October 11
    • 0 replies
    • 108 views
    • 
    • geordief
    • October 11

12. Penrose's CCC

    By QuantumT, October 10
    • 1 reply
    • 153 views
    • 
    • Markus Hanke
    • October 11

13. There should be a Real-Time Broadcasting / Streaming of Our Solar System

    By tylers100, October 8
    • 3 replies
    • 145 views
    • 
    • tylers100
    • October 8
14. An Intuitive Model: A model of the universe's origin that can be falsified by the discovery of sentient alien life

    Topic was moved to forum Speculations

15. I think I have understood what the cosmological constant problem corresponds to.

    By stephaneww, September 30
    • 1 reply
    • 138 views
    • 
    • swansont
    • September 30

16. Earth to Venus

    By Gian, September 25
    • 7 replies
    • 316 views
    • 
    • Endy0816
    • September 26

17. Steering to the stars

    By Gian, September 17
    • 3 replies
    • 243 views
    • 
    • swansont
    • September 25

18. The mass of planet Earth divided by it's radius=it's gravity?

    By Hello2, September 14
    • 2 replies
    • 201 views
    • 
    • Halc
    • September 14

19. The Sun has an atmosphere that prevents particles from the universe to reach Earth?

    By Hello2, September 11
    • 15 replies
    • 406 views
    • 
    • joigus
    • September 13

20. So there is no need for bigbang-theory?

    By Hello2, September 11
    • 3 replies
    • 275 views
    • 
    • Janus
    • September 11

21. Generational craft (split from Terraforming the Solar System) 1 2

    By Airbrush, September 2
    • 29 replies
    • 200763 views
    • 
    • Ken Fabian
    • September 5

22. Universe has no end because

    By Daystar1, June 26
    • 20 replies
    • 855 views
    • 
    • MigL
    • September 4

23. Blackholes and mass reduction

    By paulsutton, August 18
    • 12 replies
    • 448 views
    • 
    • paulsutton
    • August 21

24. Lightspeed Barrier And Black Holes

    By Photon Guy, July 9
    • 9 replies
    • 545 views
    • 
    • swansont
    • August 20

25. Could signal encryption explain the Fermi Paradox?

    By TakenItSeriously, November 24, 2019
    • 6 replies
    • 584 views
    • 
    • Airbrush
    • August 19