• Hi I was wondering do aliens exist?

    30 answers · 13 hours ago
  • Why don't we terraform every planet in the solar system?

    Alter the landscape, climate, oxygen levels, etc. of every planet with a solid surface to make them comfortable and livable for our future selves. Mercury, Venus, and Mars are relatively close and should be the easiest to deal with, so no real problems there.. The gas planets might be a little tougher to convert,... show more
    Alter the landscape, climate, oxygen levels, etc. of every planet with a solid surface to make them comfortable and livable for our future selves. Mercury, Venus, and Mars are relatively close and should be the easiest to deal with, so no real problems there.. The gas planets might be a little tougher to convert, but a solid platform (covered with soil) over the methane and ammonia (or whatever it is that fills Neptune, for example), and a solid wall to block the 1300mph winds, would be about all we need (I think). We'll have to deradiate and degravitate Jupiter somehow...that one sounds the trickiest so we will have to save that planet for last. After this planet goes belly up we'll all need a relaxing place to stay. So call it hard work well rewarded when we finally finish. Yes, I know it would be a lot of money but it will be worth it. And, yes, the engineering feats are a bit tricky, but we have such brilliant minds on this doomed planet, it should't be too much trouble to start drawing up the blueprints. The sooner the better- so lets get crackin' fellow geniuses! I would say have the report on my desk by Wednesday morning, but I don't know how to build a desk.
    24 answers · 2 days ago
  • What is bigger than the universe?

    Using fancy math, I'll bet we can determine it.
    Using fancy math, I'll bet we can determine it.
    15 answers · 17 hours ago
  • Are we gonna send Trump to the moon?

    13 answers · 12 hours ago
  • Will they really go back to the moon?

    11 answers · 6 hours ago
  • Do many people know Spiro Agnew in 1970 committed America to a manned landing on Mars by the year 2000?

    He was no Jack Kennedy so nobody paid attention. What about Trump's calls for a return to the Moon?
    He was no Jack Kennedy so nobody paid attention. What about Trump's calls for a return to the Moon?
    11 answers · 12 hours ago
  • Are wormholes real or still theoretical?

    24 answers · 3 days ago
  • Does anyone else think the stars are different? (see details)?

    I've always enjoyed looking up at the stars in the sky so it's always been a familiar sight for me. However, this last few months, the sky looks different to how I remember. There seem to be much more stars than I remember with many many more clusters and groups. Also, the other day I could clearly see the... show more
    I've always enjoyed looking up at the stars in the sky so it's always been a familiar sight for me. However, this last few months, the sky looks different to how I remember. There seem to be much more stars than I remember with many many more clusters and groups. Also, the other day I could clearly see the galactic plane which surprised me because I've only ever seen it in Africa before, never in the UK. I'm not making any assumptions or theories, I'm just wondering if anyone else has had the same feeling that I've been experiencing recently.
    9 answers · 14 hours ago
  • Would a microscopic black hole still be considered a black hole?

    Best answer: A black hole is a black hole, no matter the size. >>As far as I’ve learned, black holes the size of an atom only posses the >>gravitational pull of a large mountain. In that case, light should be able >>to escape the black hole, and if I’m correct, that means it isn’t really >>a black... show more
    Best answer: A black hole is a black hole, no matter the size.

    >>As far as I’ve learned, black holes the size of an atom only posses the
    >>gravitational pull of a large mountain. In that case, light should be able
    >>to escape the black hole, and if I’m correct, that means it isn’t really
    >>a black hole.

    It doesn't matter the amount of mass... A black hole consists of a singularity, surrounded by the Event Horizon. Whether the Event Horizon is the size of a grain of sand, or the size of Jupiter, once light falls within this boundary, it can't move fast enough to escape again.

    Something else - microscopic black holes won't last very long... they'll 'evaporate' very quickly from Hawking radiation; The larger the black hole, the longer they exist.
    10 answers · 20 hours ago
  • Trip to Mars, good or bad idea. Perhaps even pointless?

    Trip to Mars. Result. One way trip, death.
    Trip to Mars. Result. One way trip, death.
    10 answers · 20 hours ago
  • If universe came into existence by a big explosion(big bang theory), then what was the driving force behind that explosion?

    Best answer: When Father Lemaitre (a priest who happened to be a good astronomer and a very good mathematician) tried to explain the apparent expansion of distant galaxies (which he had measured with the astronomer Edwin Hubble), he used the analogy of an explosion. (The Primeval Atom Hypothesis, 1927). By the time he... show more
    Best answer: When Father Lemaitre (a priest who happened to be a good astronomer and a very good mathematician) tried to explain the apparent expansion of distant galaxies (which he had measured with the astronomer Edwin Hubble), he used the analogy of an explosion. (The Primeval Atom Hypothesis, 1927).

    By the time he developed the mathematical model to explain the expansion of space itself, the explosion had been removed. It is space that expands, thus ever increasing distances between galaxies (as long as they are far enough apart to not be gravitationally bound). This was in the early 1930s. Father Lemaitre and Albert Einstein toured together to explain this model to other mathematicians, because it is difficult to understand the mathematics behind it.

    Using the mathematical model and better observations of galaxies, a theory was finally developed, and published in 1948. The major difference between a hypothesis and a theory is that the theory makes predictions about what you should be able to measure if you were given better instruments, and - just as important - what you should measure if the theory was wrong. The theory must be "falsifiable" (the author of the theory must provide ways to prove it is wrong).

    In the theory (published 1948), there is no explosion.

    A famous astrophysicist hated the theory because it came from a priest and some people were using it as evidence that the universe was "created" (the astrophysicist was an atheist - he publicly said so himself). He created his own theory (1949) and, during a radio interview, came up with the awful nickname "Big Bang" for the other theory (because everybody had heard about the 1927 description with an explosion but not everyone understood the 1930 mathematical model that removed the explosion).
    The name stuck.
    And for 15 years, most scientists preferred the 1949 theory to the Big Bang theory, mostly because the mathematics were A LOT simpler to understand and, until they got better radio-telescopes, in 1964, it was just as good at explaining what we saw.

    The name Big Bang is unfortunate because many people think that it describes an explosion. It does not.
    Many people (including Father Lemaitre himself) thought that the Big Bang theory describes the creation (or start) of the universe. It does not. It simply describes the evolution of the universe's energy content over the last 13.8 billion years.

    ---

    The "domain" of the theory begins at a moment called the Planck Time (13.8 billion years ago) when the energy density of the universe gets low enough for us to understand how things work.
    At the Planck Time:
    -- the initial energy already existed.
    -- space was already expanding.
    -- the energy density was NOT infinite (no singularity)
    -- matter did not yet exist (the theory does explain how matter forms from the initial energy).

    Therefore, something existed "before", but the Big Bang theory cannot tell us what, since its domain cannot go "before" (in fact, we don't really understand what the word "before" means when applied to the Planck Time).
    There are many ideas, of which roughly eight or nine have some serious scientific foundation.
    It could be that the "driving force" (or a triggering event) is one of those eight or nine... or it could be something else.
    11 answers · 23 hours ago
  • What do you think of this idea? Humans will evolve to be a really big creature and earth can host only 10 of them?

    Maybe in a very very long future with some geological changes make humans to evolve very very big to nearly the size of the earth where can host only a few of the creatures. Then it is how they dominate the galaxy by jumping or swimming to nearby planets and make it another host and on and on? Would that be a... show more
    Maybe in a very very long future with some geological changes make humans to evolve very very big to nearly the size of the earth where can host only a few of the creatures. Then it is how they dominate the galaxy by jumping or swimming to nearby planets and make it another host and on and on? Would that be a scenario you think?
    8 answers · 6 hours ago
  • Alien life found only 39 light years away?

    Could this be possible?
    Could this be possible?
    25 answers · 4 days ago
  • What would happen if the moon was as big as the sun and vice versa?

    but the same temperature and place as they are now?
    but the same temperature and place as they are now?
    14 answers · 2 days ago
  • I Saw a NASA Documentary that was Talking about (ISS) International Space Station, Saying it is in a Low Orbit over the Earth at the Moment.?

    and Eventualy it will Come Back to Earth because its SLOWLY, entering Earths Gravity, Why dont they Just Take the ISS, to a HIGH ORBIT, then they can stay up there ALLOT LONGER!. Thankyou.
    and Eventualy it will Come Back to Earth because its SLOWLY, entering Earths Gravity, Why dont they Just Take the ISS, to a HIGH ORBIT, then they can stay up there ALLOT LONGER!. Thankyou.
    10 answers · 1 day ago
  • Do you know someone who thinks Astrology is a science like Astronomy?

    Is a culture dying when Astrology is rising to the same parity, credibly, as Astronomy within that culture
    Is a culture dying when Astrology is rising to the same parity, credibly, as Astronomy within that culture
    12 answers · 2 days ago