The Universe's Mysterious Dark Matter and Dark Energy [ Documentary ] | ...
Δημοσιεύτηκε στις 8 Ιαν 2017
Dark
matter and dark energy are the yin and yang of the universe. Dark
matter produces an attractive force (gravity), while dark energy
produces a repulsive force (antigravity). Together, they fill 96 percent
of the universe—and we can’t see either. Astronomers know dark matter
exists because visible matter doesn’t have enough gravitational muster
to hold galaxies together. What’s it made of? There are two adorably
acronymed leading candidates: super-dense astronomical bodies called
massive astrophysical compact halo objects (MACHOs) and weakly
interacting massive particles (WIMPs). Dark energy, on the other hand,
is why our universe is expanding. In fact, in 1998, astronomers studying
distant supernovae were shocked to learn that, around 7.5 billion years
after the Big Bang, the universe began expanding faster. That indicates
some mysterious force is fighting gravity’s pull, causing galaxies to
move apart from one another.
Related Resources -
http://science.howstuffworks.com/dict...
http://hetdex.org/dark_energy/dark_ma...
http://abyss.uoregon.edu/~js/ast123/l...
http://www.dailygalaxy.com/my_weblog/...
matter and dark energy are the yin and yang of the universe. Dark
matter produces an attractive force (gravity), while dark energy
produces a repulsive force (antigravity). Together, they fill 96 percent
of the universe—and we can’t see either. Astronomers know dark matter
exists because visible matter doesn’t have enough gravitational muster
to hold galaxies together. What’s it made of? There are two adorably
acronymed leading candidates: super-dense astronomical bodies called
massive astrophysical compact halo objects (MACHOs) and weakly
interacting massive particles (WIMPs). Dark energy, on the other hand,
is why our universe is expanding. In fact, in 1998, astronomers studying
distant supernovae were shocked to learn that, around 7.5 billion years
after the Big Bang, the universe began expanding faster. That indicates
some mysterious force is fighting gravity’s pull, causing galaxies to
move apart from one another.
Related Resources -
http://science.howstuffworks.com/dict...
http://hetdex.org/dark_energy/dark_ma...
http://abyss.uoregon.edu/~js/ast123/l...
http://www.dailygalaxy.com/my_weblog/...
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