Determining the Milky Way’s size is challenging because we’re inside it. Estimates have varied greatly, from 100,000 to 1.9 million light years in diameter. Studying the Milky Way involves accounting for dark matter’s gravitational effects since it comprises most of the galaxy’s mass but remains invisible.
Related Posts
How fast is the Universe really expanding? Multiple views of an exploding star raise new questions
NASA / ESA / P Kelly Brad E Tucker, Australian National University How did we get here? Where…
NASA’s “Lucy” Mission Launched to Study “Jupiter Trojan” Asteroids
Now, you may have already known about the asteroid belt, and that it’s situated between the orbits of…
A Bronze-Age City May Have Been Destroyed By an Exploding Asteroid
3,600 years ago, in a city sitting 11.3 km (7 mi) northeast of the Dead Sea in what…
Citizen scientists discover new type of aurora
The aurora Steve. Rémi Farvacque/Alberta Aurora Chasers (facebook) Nathan Case, Lancaster University A collaboration between aurora-hunting citizen scientists…