What is the name of the galaxy we live in? - Socratic
Apr 7, 2018 · The Milky Way Galaxy We live in one of the arms (a.k.a Orion arm) of the milky way galaxy which was named as such by the ancient Greeks because it looked like a river of milk …
Our Galaxy: The Milky Way - Astronomy - Socratic
The best videos and questions to learn about Our Galaxy: The Milky Way. Get smarter on Socratic.
How fast is our galaxy moving through space? Is the movement
Sep 24, 2017 · It is impossible to say what speed our galaxy is moving through space as there is no such thing as absolute velocity. It used to be thought that space and time were absolute …
How did astronomers determine the shape of our galaxy?
Jul 18, 2016 · As there is lot of dust and gases in the milky way galaxy we can not see the full galaxy. Molecular hydrogen produce radio emission in 21 centimeter and radio telescopes can …
How do we know the Sun is not at the center of the Milky Way …
Jan 9, 2016 · If the Sun was at the centre of our galaxy we would be inside a supermassive black hole. The Sun is in one of the spiral arms of the galaxy. The stars are relatively far apart. …
How many earth years would it take to reach andromeda galaxy?
Feb 17, 2016 · It depends on your speed. It depends on your speed. The distance of Andromeda galaxy from Earth is 2.537 million light years and hence it will take that many years for light to …
Do all galaxies spiral in the same direction? Do all planets
Feb 6, 2018 · Nothing really revolves in any direction in space, it is merely the direction in which you look at the said object. A galaxy spinning counter clockwise 'from above' would be seen to …
How do we determine the amount of dark matter in elliptical
Apr 12, 2017 · Astronomers look at the size and amount of visible material. They then figure out how much gravity it takes to hold the galaxy together, always greater than the observed mass, …
What is the order from largest to smallest: galaxy, universe, star ...
May 19, 2017 · From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid. Let's describe them from smallest to largest. In fact the size order is not …
Cepheid Variables - Astronomy - Socratic
What can we learn from this observation? Why do cepheid variables pulse and how does this pulsate help calculate distance? If a cepheid variable in a nearby galaxy is 106 times fainter …