• Why will it takes months to fly astronauts to mars?

    I'm pretty sure since we last went to the moon technology has increased to the point that we should be able to build a spacecraft to get them there in a week or 2
    I'm pretty sure since we last went to the moon technology has increased to the point that we should be able to build a spacecraft to get them there in a week or 2
    12 answers · 2 days ago
  • How far is Uranus from Earth?

    7 answers · 11 hours ago
  • What "major discovery" do you believe nasa's kepler telescope team is planning to announce thursday?

    Best answer: it will be more fake news , even with kepler we can't even see a star , only its light the only actual star we can see is the sun ,EVERYTHING they announce is theory , conjecture and guesswork, it's getting very tiring and unscientific
    Best answer: it will be more fake news , even with kepler we can't even see a star , only its light the only actual star we can see is the sun ,EVERYTHING they announce is theory , conjecture and guesswork, it's getting very tiring and unscientific
    7 answers · 14 hours ago
  • Do aliens really exist?

    Best answer: Flatly put - we don't know... Earth could be a truly unique planet, one with the only life in the universe, or it could be just another planet with life, one of trillions... All anyone has today is opinion - mine is that there probably *is* other life - and intelligence - out there; I'm guessing it's... show more
    Best answer: Flatly put - we don't know... Earth could be a truly unique planet, one with the only life in the universe, or it could be just another planet with life, one of trillions...
    All anyone has today is opinion - mine is that there probably *is* other life - and intelligence - out there; I'm guessing it's probably relatively rare, but I'd place a bet that it exists...
    But - that could be wrong... we'll just have to wait for evidence to show us either way, and keep an open mind in the mean time.
    34 answers · 5 days ago
  • Can stars eventually turn into planets?

    Given enough time, say a few billion years and maybe a few billion more, a star dies and cools and shrinks leaving only a rocky core. If it continues to cool to a point whereupon we could walk on it without a spacesuit then can we call it a planet?
    Given enough time, say a few billion years and maybe a few billion more, a star dies and cools and shrinks leaving only a rocky core. If it continues to cool to a point whereupon we could walk on it without a spacesuit then can we call it a planet?
    10 answers · 2 days ago
  • Is the Milky Way galactic center visible at daytime?

    Is the Milky Way galactic center visible at daytime?

    Best answer: No an isn't visible at night either because it's shrouded in dust. you can't SEE the event horizons of black holes. All you can is is the light generated from the friction in the accretion disk AROUND the black. At this time of year the lower ... show more
    Best answer: No an isn't visible at night either because it's shrouded in dust. you can't SEE the event horizons of black holes. All you can is is the light generated from the friction in the accretion disk AROUND the black. At this time of year the lower right corner of the Teapot asterism in Sagittarius where Sagittarius A* is located is definitely not visible because it is above the horizon during the day this time of year.. Even when Sagittarius IS visible you still cannot 'see" Sag A* is because there's lane of black dust blocking the light, form the core of the Milky Way Galaxy.
    8 answers · 1 day ago
  • Is everything In the Universe 3rd dimension?

    Hello guys I m sorry if this is a stupid question but I m just in 8th grade and stuff like this don t teach at my school. I kinda know what is a 4th dimension but is it only exist maybe in another universe? And everything in our Milky way (and other galaxies) is in a 3rd dimension? Excuse me for the stupid question
    Hello guys I m sorry if this is a stupid question but I m just in 8th grade and stuff like this don t teach at my school. I kinda know what is a 4th dimension but is it only exist maybe in another universe? And everything in our Milky way (and other galaxies) is in a 3rd dimension? Excuse me for the stupid question
    11 answers · 2 days ago
  • Is there any natural force that may not have been discovered till today's date in physics/astronomy?

    A force or many forces that might be existing in the universe that maybe completely different from known forces such as magnetic force, centripetal force, gravitational force etc. that maybe secret to many of the mysteries of the universe.
    A force or many forces that might be existing in the universe that maybe completely different from known forces such as magnetic force, centripetal force, gravitational force etc. that maybe secret to many of the mysteries of the universe.
    6 answers · 17 hours ago
  • How many species of Aliens have been identified so far?

    Best answer: If you believe this video: https://www.youtube.com/watch?v=RGe8421BWNE Then 82. However based upon credible first hand accounts, 2. The first is the Greys that have been seen -- well, pretty much all over the media. It is said they are from the Zeta Reticuli star system 39 light years away. That is based upon... show more
    Best answer: If you believe this video:

    https://www.youtube.com/watch?v=RGe8421BWNE

    Then 82.

    However based upon credible first hand accounts, 2.

    The first is the Greys that have been seen -- well, pretty much all over the media. It is said they are from the Zeta Reticuli star system 39 light years away. That is based upon a starmap made by Betty Hill under hypnotic regression which is believed to depict the view of our solar system from their world which an amateur astronomer believes is from the Zeta Reticuli star system.

    There are also what are called the Nordics which were reported by Travis Walton. According to conspiracy theorists, the Nazi's believed that they were from Aldebaran.

    Though the sources of their origins may be unreliable or heavy on second, third, fourth hand information -- if only that.

    Native Americans also talk of Star People which according to legend are from the Pleiades star cluster. But that's only a legend, however there have been numerous unusual reports even by today's obersvations.
    23 answers · 5 days ago
  • If a gravitational singularity is infinite in any physical quality why doesn't it take up infinite space?

    Best answer: "Singularity" is a mathematical object that belongs to the domain of a function. It does not need to be infinite. It does not need to be a point (in some functions, the "sigularity" is a volume, sometimes finite, sometimes infinite). We have no idea what a "gravitational singularity"... show more
    Best answer: "Singularity" is a mathematical object that belongs to the domain of a function.
    It does not need to be infinite. It does not need to be a point (in some functions, the "sigularity" is a volume, sometimes finite, sometimes infinite).

    We have no idea what a "gravitational singularity" means.

    In the Big Bang theory, the "singularity" is a time interval: the time interval that falls "before" the Planck Time, the first moment that can be understood with the Big Bang thoery (that moment, 13.8 billion years ago).

    AT the Planck time, nothing is infinite, nothing is infinitely small. Values are finite.

    IF (a big if) you attempt to push the mathematical model outside of its domain (meaning = "before" the Planck Time), energy density grows without bound. But that is because we do not understand how time itself "flows" above the Planck value for energy density (itself a finite value).

    Bluntly: we do not know what the word "before" really means. So that if you try to go "before"... you are on your own.

    At the Planck Time:
    -- The initial energy already existed.
    -- Space was already expanding.
    -- Energy density was NOT infinite.
    -- We think gravity already existed.
    -- We know matter did not yet exist (it comes later and the theory does explain how).

    this next one is conditional:

    IF (a big if) the universe is now infinite in spatial extent, then it was already infinite at the Planck Time.

    How was it "before"? We don't know, since we do not know that the word "before" means when you apply it to the Planck Time.

    It is (a bit) like asking: how fast can you pour a glass of water, once the water is frozen in the glass.
    At energy densities above the Planck density... time is "frozen" (and we do not know what that means, either).
    10 answers · 5 days ago