Week 1
What is the speed of light?
If you change your viewing angle things look different.
What is Parallax?
What is an Irregular Galaxy?
The lack of a preferred location in the Universe
An object that absorbs all energy that hits it and re-emits it across all wavelengths.
What is a blackbody?
Distance to a star with the parallax of 1 arcsecond
What is a parsec?
Gas and dust in between stars
What is the interstellar medium?
A galaxy with a black hole "feeding" on gas
What is an Active Galaxy?
The age of the Universe
13.8 billion years
Direct mass measurements are only available for these kinds of stars.
What are binary stars?
How bright the object appears to us on Earth. Similar to brightness
What is Apparent Magnitude.
Gas and dust glowing blue, illuminated by nearby stars
What is Reflection Nebulae?
The smallest clump of galaxies.
What is a group?
True or false: In an expanding universe it will appear as if all the galaxies are moving away
True
Roughly 90% of all stars are these kinds of stars
The final stage of an average-mass star.
What is a white dwarf star?
The velocity required to escape an object's gravitational influence
What is the Escape Velocity Limit?
WIMPS interacts via ____
What is gravitational force?
If life is abundant, where is everybody?
What is the Fermi Paradox?
Brightness levels on a graph vary based on the positions of these stars
What are Eclipsing Binary Stars?
The heaviest element a star can fuse.
What is iron?
True or false: Red stars are found in the spiral arms
False
The result of two roughly equal sized galaxies colliding
What is matter and antimatter?