galaxies articles - Page: 2
Which type of galaxy contains mostly older stars?
When we gaze into the cosmos, the sheer variety of galaxies can seem overwhelming, but astronomers simplify this vastnes...
What is a galaxy made up of gas, dust, and stars?
Galaxies are vast, gravitationally bound systems composed of stars, stellar remnants, interstellar gas, dust, and an imp...
What galaxy arm is Earth in?
Our cosmic address places the Sun, and by extension, Earth, within a specific, smaller feature of our massive home galax...
Can a supernova be brighter than a galaxy?
That a single stellar explosion can momentarily outshine an entire galaxy containing hundreds of billions of stars might...
What is inside of the Andromeda Galaxy?
The Andromeda Galaxy, known formally as Messier 31 (M31), is our nearest major galactic neighbor, a massive spiral struc...
What is the rotation curve of a galaxy?
This fundamental concept in astrophysics, the galaxy rotation curve, is essentially a graph mapping out how fast materia...
Is a spiral galaxy gas or dust?
A spiral galaxy is fundamentally a mixture of celestial components, not a simple choice between being only gas or only d...