Did you know?
Hello everyone !
We are surrounded by a black halo.
The Milky Way is nested in a cluster of dark matter much larger and more massive than the galaxy itself.
In the late 1960s, astronomer Vera Rubin deduced the presence of dark matter in the periphery of galaxies by studying the speed of rotation of stars in spiral galaxies.
She observed that the stars near the outskirts of Andromeda were moving at a speed that should have sent them to the far reaches of the universe.
And yet they stayed in their orbit, which meant that some sort of cosmic glue held them together.
This "glue", we now know, is dark matter.
Good day and good game ;)