1 Can a star turn into a planet?
2 Can gravity form waves?
3 Does every black hole contain a singularity?
4 Does sound travel faster in space?
5 Does the influence of gravity extend out forever?
6 Galaxies look stationary, so why do scientists say that they rotate?
7 Have aliens ever visited earth?
Answers
1.Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf. Some scientists do not consider brown dwarfs to be
true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen.
2.Yes, gravity can forms waves. Gravitational waves are ripples in spacetime that travel through the universe. ... General relativity describes gravity as a warping or curvature of space and time. All objects warp spacetime.
3.In the real universe, no black holes contain singularities. In general, singularities are the non-physical mathematical result of a flawed physical theory. ... A singularity is a point in space where there is a mass with infinite density.
4.Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Radio is a form of electromagnetic radiation just like light and can therefore travel through the vacuum of space just fine.
5.No. As you get farther away from a gravitational body such as the sun or the earth (i.e. as your distance r increases), its gravitational effect on you weakens but never goes completely away; at least according to Newton's law of gravity
6.Galaxies do indeed rotate. It's because galaxies are unimaginably huge. ... An object traveling at high speed across a very long distance appears to be moving slowly when viewed from far away.
7.Unfortunately, neither of the answers feel satisfactory. To be alone in this vast universe is a lonely prospect. On the other hand, if we are not alone and there is someone or something more powerful out there, that too is terrifying.
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1.YES
2.YES
3.NO...In the real universe, no black holes contain singularities
4.Sound does not travel at all in space(vacuum)
5.No. As you get farther away from a gravitational body such as the sun or the earth (i.e. as your distance r increases), its gravitational effect on you weakens but never goes completely away; at least according to Newton's law of gravity.
6.Galaxies do indeed rotate. It's because galaxies are unimaginably huge. ... An object traveling at high speed across a very long distance appears to be moving slowly when viewed from far away
7.According to the findings of mainstream science, aliens have never visited the earth. Despite the whimsical fantasies of fictional works and the confusion of supposed eye-witnesses, there is no credible scientific evidence that aliens have ever visited the earth. Aliens did not visit the earth anciently and build the pyramids, nor do they sneak onto our planet in our day. Because of the unreliability of the human eyes and human brain, scientific data is established through (1) quantification, (2) use of accurate tools, and (3) repetition.
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