Sagittarius A*: Black Hole at Centre of Milky Way Flashcards
What is the name of our galaxy and what is the name of the blackhole at the centre of it called?
Milky Way
Sagittarius A*
Recently who revealed the first image of the black hole
named Sagittarius A* at the centre of our galaxy
Scientists from the Event Horizon Telescope
(EHT) facility,
Researchers called the black hole?
“the gentle giant
in the centre of our galaxy”.
In 2019, the Event Horizon Telescope made history
by??
by releasing the first ever image of the shadow of a black hole
Messier 87 (M87) – the black hole at the centre of
a galaxy M87, which is a supergiant elliptic galaxy.
What does Black Hole Image Unveil?
> that there is a blackhole at the center of our galaxy
It is near the border of Sagittarius and Scorpius
constellations.
It is 4 million times more massive
than our sun.
Einstein’s general theory of relativity
that a point in space where matter is so compressed
as to create a gravity field from which even light
cannot escape.
researchers said that imaging Sagittarius A*, the
black hole at the centre of the Milky Way, was much
more difficult than imaging M87.
What are Black Hole?
theorized: Albert Einstein in 1915
coined : mid-1960s
by American physicist John Archibald Wheeler.
black holes belong to two categories: [which one does milkway’s blackhole belong to?]
- stars die
- supermassive black holes.
supermassive black holes.
Event Horizon
region of space beyond the black hole
called the event horizon. This is a “point of no
return”, beyond which it is impossible to escape
the gravitational effects of the black hole.
Event Horizon Telescope Project
group of 8 radio telescopes (used to detect
radio waves from space) located in different parts
of the world.
Gravitational waves are created when?
two black
holes orbit each other and merge.
