The first image of the black hole lying in our galaxy
On Thursday night, the Event Horizon Telescope released the very first image of the supermassive black hole that lies at the centre of our Milky Way galaxy.
Called Sagittarius A*, it weighs about 4 million times the mass of the sun. Getting an image of this, once thought impossible, was an amazing technical achievement.
We have had measurements and data of the supermassive black hole for decades.
Using telescopes in Hawaii and Chile, scientists have monitored the orbits of stars near Sagittarius A*.
By carefully monitoring the movement of stars around Sagittarius A*, they could calculate their orbit, and therefore the amount of gravity needed for that orbit.
If you can calculate the gravity, you then also can figure out the mass. This same method was used to calculate …
More on: www.canberratimes.com.au