Why do stars orbit in our galaxy at the same speed?
How come the stars at the outer edge of the galaxy are rotating at the same speed as the stars towards the center?
How is the motion of stars similar to the motion of the sun? At what speed does our solar system orbit around the center of the Milky Way galaxy? What is similar to the motion of the stars and the sun? Is the sun, and are other stars, in motion? How fast is our solar system traveling through space in relation to our galaxy's center? How fast is Earth revolving around the center of our galaxy? Analysis of data from the COBE survey indicates that the Milky Way is travelling at a certain velocity towards a particular point in the sky. Is it known whether our galaxy is oriented edge-on or face-on as it follows this trajectory? Why do planets orbit stars? Are all the stars in the sky, suns? Does the Sun actually move through the constellations? Why do the stars in the night sky describe a circle if we are moving around the sun too (look at a photo of the stars taken with a long exposure)? How do stars move (describe the movement of the stars in the night sky)? How do astronomers measure the proper motion of a star when the star moves only a few arcminutes per year? In the Milky Way Galaxy, relative to the Sun, how many stars are bigger or smaller? Do galaxies travel faster than the speed of light? Why all planets are circling the sun in the same direction? Does the Milky Way Galaxy have an orbit? What about our universe? Why is the Milky Way Galaxy spiral? Why all the planets of this solar system are moving in the same direction around the sun? What does the Milky Way galaxy orbit? Do stars move or not? How fast is the total movement of the earth due to revolving around the sun, revolving of the galaxy, movements of the galaxy, expansion of space etc? Why do many spiral galaxies form a bar in the center? Does the Death Star have a top and bottom, or does gravity operate from the middle out to the edge? Why is the earth's orbit around the sun almost circular? Why does it appear that the moon and stars move in the sky? How is the sun a star? Can you explain the physics of the Death Star? Is the black hole in the center of our galaxy moving? Do all planets have to orbit a star?