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  1. M

    Early Earth Atmosphere

    If Mars used to have a denser atmosphere in the past, could Earth have had one as well?
  2. M

    Moons of moons?

    Does anybody know if it is even possible for a planetary moon to have a moon of its own orbiting it?
  3. M

    Time relations

    Cepheid Would say a cepheid variable star in a galaxy moving at 150,000 mps away from us appear to blink slower and how would this slow blinking, if so, be related to the redshift at which it was detected?
  4. M

    Time relations

    Yes that is probably correct.
  5. M

    Time relations

    If quasars are appearing to travel at almost the speed of light from us, what would the relative time frames between us be.
  6. M

    Radio laser

    But will it be directional without lasers?
  7. M

    Radio laser

    Well, there goes my idea for interstellar probe communication. :)
  8. M

    Radio laser

    Are these Masers radio frequency? THought it might be easier to use a radio laser to communicate from space probes and such. a tighter beam aimed at the earth you know rather than all directions.
  9. M

    Radio laser

    Has anyone created a radio laser, if not why not if you know...
  10. M

    Photons and black holes

    In that case, could there be enough neutrinos orbiting the galaxy to account for some "dark" matter?
  11. M

    Photons and black holes

    Thanks you for your reply, I meant within by which a neutrino can pass through mass without likleyhood of collision so a neutrino in an eccentric orbit could pass through the sun on part of its orbit perhaps.
  12. M

    Moon moving away

    I hear that the moon is steadily moving away from the earth. Is it due to the suns gravity? Will it eventually go out of earth orbit and circle the sun on its own? Would there be any chance of a posssible collision with earth if this happened or would it leave earth orbit at its closest...
  13. M

    Photons and black holes

    Does this mean that neutrinos could be orbiting within a large enough mass?
  14. M

    Photons and black holes

    Does a black hole bend the space that photons travel in so that they are bent towards it? How would gravity attract a photon if they have no actual regular mass? Also, are neutrinos attracted to black holes and sucked in (theoretically?)
  15. M

    Philosophy: Should we eat meat?

    Short story There is a short story by Gardner Dozois called I believe "A Kingdom by the Sea" It talks a great deal about a slaughter houses and used to be posted on the scifi.com website. It was published in 1972 I believe. Its worth a read.
  16. M

    Green stars?

    but I have heard of stars appearing green to the naked eye using backyard telescopes.
  17. M

    Green stars?

    "There is a big difference between ordinary novas (all are binary stars with a white dwarf companion) and supernovas. Antares does have a distant (green!) companion, but it is a red super giant itself, and will likely become a "Type II supernova" eventually. " Someone on a mailing list I...
  18. M

    Do we need pain?

    I'm not sure there is only pleasure or pain, one or the other. Maybe there is a middle state of mild nothingness. Pain is useful in that it keeps us away from body destroying danger. Pleasure is useful because it is like a reward for people who are sad. But mild nothingness can be a state in...
  19. M

    Do we need pain?

    This is an oft quoted statement that doesn't by any means always work. Just ask someone who has been struck by lightning and lived with years of disabling pain. It might be a nice platitude for a warrior, and it might be true some of the time. Maybe say what doesn't kill me makes me bitter. ;)
  20. M

    Should marijuana be legalized?

    Pot has a culure associated with it as well. In my part of the world, people who smoke often smoke socially and peer pressure can be great to smoke it when every person you know says hey come on its the good stuff when you go over to their house. This can mak it hard to stop. I assume this...
  21. M

    Interstellar gas cloud

    Thank you very much for your patient and well-crafted answer.
  22. M

    Interstellar gas cloud

    Well. I'm not much educated about some of these things, it seems people are always saying stuff like " the terrible cold of 'space'" or something. Not only that, but when one gets far away from the sun, so I assumed for any star or starlike source, it gets colder: like Pluto and Charon.
  23. M

    Interstellar gas cloud

    http://science.nasa.gov/headlines/y2004/27sep_shieldsup.htm?aol667632 [Broken] At the above link, it appears there is a high temperature cloud of gas has been colliding with the solar system. What could keep a cloud of gas at such a high temperature in the interstellar medium?
  24. M

    Purpose of life?

    I dont believe the purpose of life was originally to explore the universe and its mysteries but to many of us that is what it has become. :)
  25. M

    Science is used just for profit?

    Also, it seems that perhaps many "natural" i. e. non-patentable cures, simply can't afford the funding for clinical trials as little profit can be made from them to recoup costs and provide growth for investors.
  26. M

    Arthur C. Clarke/Carl Sagan

    Dragons of Eden and Pale Blue Dot are some good books by Carl Sagan.
  27. M

    A card game

    1 out of twentysix?
  28. M

    Chat seems to be down.

    Yup sure does. :)
  29. M

    Recycle Radioactive Material?

    Anyone know if the mining of uranium is now safer than it was in the past when all of the native americans became ill from working in them?
  30. M

    Recycle Radioactive Material?

    I have heard that the temperature in Yucca Mountain, when full of waste, will be quite high. What is the reason we can't use this waste to fuel steam turbines for a long time?
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