|What would happen if there was no sun in the
universe, not even stars?|
|Question Date: 2017-03-01|
Without stars in the universe there would be no
elements other than hydrogen (H) and helium (He)
which formed very soon after the universe exploded
into EXISTENCE 13,800,000,000 years ago.
This is because all elements from atomic number
3, lithium (Li) to atomic number 92, uranium (U)
are formed within stars or when stars end their
lives and go supernovae. So, without stars
there would be no iron (Fe), no carbon (C), no
oxygen (O), no magnesium (Mg): then no animals,
no rocks, no plants, no atmosphere, and no water.
Basically planets could not exist and neither
could you or I.
The mass in our Sun comes from mass sticking
together as it floats through space. We can think
of stars as big balls of mass that acquire energy
by getting more mass, and lose energy by turning
it into light.
We think of what would happen if there were no
sun, or stars at all. Since our solar system was
created in a cloud of dust that came from old
exploding stars. If there were never stars to form
this dust cloud, then our solar system would not
have formed. There would just be a lot of
Maybe Earth could have formed without stars,
from some giant cloud of dust. Gravitational
forces would cause dust to stick to Earth and with
enough mass being “cooked” in Earth’s hot center,
it would release light, acting like our sun!
The mass in stars, planets, and galaxies are
all connected. A dust cloud, from old exploding
stars, could stick to itself to form a planet,
star, or asteroid. We call this kind of dust cloud
a “nebula” and stars and solar systems form
most easily here. If we look back to where our sun
came from, we would find some nebula formed by
exploded stars. But each one of these stars are
formed by other nebulas, made by other exploded
stars! We now see that many objects in space
would not exist without the formation of
stars. I hope this gives an answer to your
If the sun (a star) suddenly disappeared, many
things would go wrong. Everything surrounding
it that depends on its gravity would suddenly fly
off their respective axes and into space. As for
Earth, since it takes 8 minutes for light to get
from the sun to us, our sky would go dark after 8
minutes! A few moments after that, the moon would
also become invisible because it’s also lit up by
the sun. Earth would eventually get very cold,
freezing on the surface. The atmosphere would
also freeze and fall to Earth’s surface, exposing
it to radiation traveling through space. Life on
Earth would eventually dwindle down to just a few
microorganisms that were able to survive the harsh
conditions. See, the sun is way more important
than we give it credit it for!
If there is no sun in the universe, there is
probably no light at all. I can hardly imagine
a world or universe without light, as there is
probably no living things at all. As a matter
of fact, most of the planets without receiving
enough light could be extremely cold, which is a
disaster to living things. It could take billions
of year or more for any living things to develop
in such extreme environment.
The universe would be dark and cold. Everything
would freeze. However galaxies would still be
there, since the gravity that holds them together
mainly comes from dark matter, not stars.
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