The Milky Way is centered around a black hole.
The Milky Way is a hugely enormous galaxy made up of around 300 billion
stars, one of which is our Sun. The solar system is made up of planets and
asteroids that circle the Sun. Our galaxy is one of hundreds of billions of
galaxies in the observable universe, each with its own distinct star systems,
which include white dwarfs, red giants, pulsars, neutron stars, and a variety
of other star types.
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We've all seen images of our galaxy, with individual stars glimmering in spiral arms that appear to spin out from the center, but what lies at the core of the vast galaxy we call home?
The Sun must be a really happy tiny star. Not that it's insignificant.
More than a million Earths could fit within our Sun, yet in comparison to the
massive masses found across the galaxy, our Sun is somewhere in the bottom half
in terms of size. It is classified as a Type 'G,' also known as a yellow dwarf,
which is around 15 times smaller and 60 times lighter than an ordinary Type
'O,' also known as a blue supergiant.
Go Big or Go Home
Stars generate heat and light through a process known as 'nuclear
fusion,' which is also utilised in contemporary nuclear weapons. However, when
stars grow large enough for their own gravity to kill them, a beautiful cosmic
explosion known as a supernova occurs. This explosion has the potential to
produce either neutron stars or black holes.
Neutron stars are the densest and tiniest stars in the cosmos, with
around 2 solar masses compacted into a radius of about 11 kilometers. They are
the leftovers of enormous stars that have condensed to inconceivable densities.
A neutron star the size of a teaspoon would weigh nearly 1.5 times the mass of
the Great Pyramid of Giza.
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The leviathan of cosmic quandaries, the black hole, is formed by denser
neutron stars and massive supernovas. A black hole is an extremely dense entity
from which even light cannot escape its gravitational field. Until the 1960s,
physicists questioned the existence of black holes. Even Einstein felt it
contradicted all we knew about physics and astronomy. They eventually agreed
that black holes eat up all incoming stuff and do, in fact, exist.
Even Bigger?
Alright. We've heaellar.' A black hole may alter the fabric
of space-time itself, leading things to approach closer until they are drawn
into the 'event horizon,' or point of no return. to comprehend the operation of black holes better.
Black holes are often fairly tiny in comparison to the stars we saw
previously, but they have far more mass than these stars, which explains why
their gravitational pull is so immense. This brings us to the appropriately
termed supermassive black hole (one of my favorite things about astronomy is
that extremely complex ideas have such simple names).
Two astrophysicists from the University of Cambridge proposed in 1971
that the Milky Way's core includes a black hole. An astronomical radio source
has been identified near the galactic center, around 26,000 light years from
our solar system. Sagittarius A is the name given to this area, which is around
40 million kilometers wide and relatively tiny in comparison to many other
supermassive black holes. If it were at the center of the solar system, its
surface would be barely inside Mercury's orbit.
We don't know what Sagittarius A is since it's too tiny and far enough
for telescopes to detect anything other than radio emissions, but we're quite
sure it's a supermassive black hole because of its tremendous mass: 4.1 million
times the mass of our sun. It may possibly be a massive floating pizza slice,
but it seems less plausible.
So, the Milky Way galaxy most certainly circles a huge, seething black
hole that warps space-time itself and devours stars for breakfast. It's so far
away that a whole galaxy spins around it. let's hope it remains that way!
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