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At extremely high temperatures (e.g., millions of degrees), which of the following best describes the phase of matter?

Star X has a smaller parallax angle than star Y. What can you conclude?

Newton’s version of Kepler’s third law states says that the orbital period depends on what quantities?

What kind of pressure prevents a white dwarf from collapsing?

 After a supernova explosion, the remains of the stellar core can be ________.

Why would we expect WIMPs to be distributed throughout a galaxy’s halo, rather than settled into a galaxy’s disk?

What is the name for the phenomena that occurs when the moon passes between the Earth and the sun, casting a shadow on the Earth.

Which two quantities must you know in order to place a data point for a star on an H-R diagram?

Which astronomer collected a lot of data on the position of the planets that helped Kepler to derive his three laws?

An astronaut in space swings a ball attached to a string in a circular motion. If the string suddenly breaks, how will the ball move?