Physics, Space Science and Theories

1,706 topics in this forum

1. Is Interstellar Travel Possible? 1 2

   By alberto91, August 21, 2020
   • 40 replies
   • 1.8k views
   • 
   • Rusted
   • August 25, 2020

2. Dark adaptation - more than meets the eye?

   By jambouk, August 18, 2020
   • 14 replies
   • 551 views
   • 
   • markse68
   • August 23, 2020

3. Elliptical Transfer-Intercept Orbits: Non-Hohmann Transfer Orbits that Take You Somewhere

   By David Sims, August 17, 2020
   • 0 replies
   • 453 views
   • 
   • David Sims
   • August 17, 2020

4. Scientists deserve to be Entertained too! :P

   By Macavity, August 8, 2020
   • 0 replies
   • 389 views
   • 
   • Macavity
   • August 8, 2020

5. I designed a crewed interstellar spacecraft

   By alberto91, July 4, 2020
   • 5 replies
   • 817 views
   • 
   • Zakalwe
   • August 7, 2020

6. Interview about new proposed interstellar spacecraft

   By alberto91, August 7, 2020
   • 0 replies
   • 316 views
   • 
   • alberto91
   • August 7, 2020

7. Supernova 1987A is a neutron star

   By PaulM, August 4, 2020
   • 5 replies
   • 398 views
   • 
   • Tenor Viol
   • August 4, 2020

8. My arXiv preprint on a crewed interstellar spacecraft

   By alberto91, July 25, 2020
   • 2 replies
   • 334 views
   • 
   • LukeSkywatcher
   • July 25, 2020

9. Question Supernova remnant

   By Marvin Jenkins, July 22, 2020
   • 4 replies
   • 478 views
   • 
   • robin_astro
   • July 24, 2020

10. Question re binary star systems

    By Kate_C, July 16, 2020   

    • binary star
    • binary star sytem
    • (and 6 more)

      Tagged with:

      • binary star
      • binary star sytem
      • planets
      • stars
      • sunset
      • sunrise
      • sunrise sunset duration
      • science fiction
    • 3 replies
    • 571 views
    • 
    • Sunshine
    • July 19, 2020

11. Make your own Particle Detector

    By Macavity, May 14, 2020
    • 16 replies
    • 1.2k views
    • 
    • saac
    • July 7, 2020

12. Bizarre tennis racket rotation :D

    By Macavity, July 5, 2020
    • 4 replies
    • 441 views
    • 
    • Stub Mandrel
    • July 6, 2020

13. Meteorite? Identification help.

    By Marvin Jenkins, July 4, 2020
    • 4 replies
    • 1.2k views
    • 
    • Marvin Jenkins
    • July 5, 2020

14. Kezzba's Hypothesis=Planet 9 a black hole.

    By Kezzba, October 20, 2017   

    • theorys
    • planet 9
    • (and 1 more)

      Tagged with:

      • theorys
      • planet 9
      • black hole
    • 7 replies
    • 1.3k views
    • 
    • Kezzba
    • June 30, 2020

15. What came before the Big Bang 1 2 3 4 6

    By Scotti G, May 21, 2020
    • 136 replies
    • 4.9k views
    • 
    • saac
    • June 10, 2020

16. CERN Physics before the LHC

    By Macavity, April 3, 2020
    • 7 replies
    • 691 views
    • 
    • Macavity
    • May 19, 2020

17. Light units and information 1 2

    By jetstream, May 8, 2020
    • 40 replies
    • 1.5k views
    • 
    • jetstream
    • May 10, 2020

18. Black hole detected just 1,000 light-years from Earth

    By Waddensky, May 7, 2020
    • 0 replies
    • 419 views
    • 
    • Waddensky
    • May 7, 2020

19. Tails

    By Michael Kieth Adams, April 20, 2020
    • 6 replies
    • 750 views
    • 
    • Michael Kieth Adams
    • April 25, 2020

20. Two Planets in Same Orbit?

    By Sunshine, January 10, 2020
    • 9 replies
    • 1.5k views
    • 
    • leibek
    • April 10, 2020

21. 'Dissecting' a distant galaxy

    By Ships and Stars, April 2, 2020
    • 7 replies
    • 784 views
    • 
    • leibek
    • April 10, 2020

22. Hubble Image

    By barkis, February 13, 2020
    • 4 replies
    • 894 views
    • 
    • BLUEThumb
    • April 1, 2020

23. Acoustics and Interdisciplinary Science?

    By Macavity, March 28, 2020
    • 7 replies
    • 464 views
    • 
    • Martin Meredith
    • March 29, 2020

24. What A Lunar Or Solar Eclipse Would Look Like From The Surface Of The Moon

    By johnno0015, March 29, 2020   

    • eclipse
    • theorys
    • (and 3 more)

      Tagged with:

      • eclipse
      • theorys
      • theory
      • moon
      • solar eclipse
    • 2 replies
    • 563 views
    • 
    • johnno0015
    • March 29, 2020

25. Wormhole in 360 Virtual Reality

    By Ruud, March 21, 2020
    • 0 replies
    • 582 views
    • 
    • Ruud
    • March 21, 2020