hydrogen

The ESA Finds Champagne Nebula And Brighter Sets of Stars

This stunning nebula, called RCW 34 and visualized by the European Southern Observatory's (ESO) Very Large Telescope (VLT), is home to young stars that heat gases, causing them to expand outward. In this brightest area of the nebula heated hydrogen bursts into the vacuum outside the gas cloud, "uncorking" the nebula. This kind of process is called a champagne flow, and the entire area provides rich fodder for astronomers as it continuously produces new, brilliant stars.
Artist's Rednering of the Milky Way's Hot Halo, Stripping Away Star-Forming Hydrogen from its Neighbors.

How the Milky Way Dominates the Stellar Block—Dwarf Galaxies, Get Out of the Way

It’s no big secret that humans tend to think of themselves as the center of the universe. It’s a flaw that has countlessly been proven wrong as science emerged and showed a different view of the world a around us. However, as it turns out, our galaxy may also be to blame for believing it too is the center of the universe.
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