A ________ nebula is formed by a dying star that is losing its gaseous envelope, but has ionized the surrounding gas cloud with its superheated core. (CHAPTER 12)
The phenomenon where the wavelengths of photons are expanded as a result of the natural expansion of the universe is the called cosmological _______. (CHAPTER 17).
_____ channels on Mars potentially serve as evidence of past floods from the highlands into the northern plains. (CHAPTER 6)
The apparent path of the Sun as it travels across the sky (CHAPTER 0)
The region of the Earth's atmosphere below 12 km. (CHAPTER 5)
This moon of Jupiter is the most geologically active object in all of the solar system. (CHAPTER 8)
A type of telescope that focuses light via mirrors that bounce the light. (CHAPTER 3)
Life-forms that have adapted to live in extremely hostile environments, such as hydrothermal vents or frozen lakes. Such creatures may also live on worlds like Mars or Europa. (CHAPTER 18)
The ____ cloud is a huge collection of comets that orbit the Sun from far beyond Pluto. (CHAPTER 4)
A type of variable star that is luminous enough to be used to measure distances of up to 25 Mpc. (CHAPTER 14)
One of the two celestial coordinates used to describe the position of stars in the night sky. This one is measured in degrees north or south of the equator. (CHAPTER 0)
Dark blotches on the surface of the Sun consisted of an umbra and a penumbra. (CHAPTER 9)
All matter between the stars (chiefly gas and dust) is collectively referred to as the interstellar ______. (CHAPTER 11)
Close galactic interactions and even galactic mergers can result in the a _______ galaxy, which exhibits galaxy-wide star-formation. (CHAPTER 16)
The range of the electromagnetic spectrum with the longest wavelengths. (CHAPTER 2)
The greatest possible distance from the Sun in a planet's orbit. (CHAPTER 1)
The series of main sequence star classifications from hottest to coolest. (CHAPTER 10)
It is theorized that this object, the largest of Neptune's moons, was captured from the Kuiper Belt. (CHAPTER 8)
The __________ spectrum consists of all the possible wavelengths of electromagnetic radiation the human eye can see. (CHAPTER 2)
A _____ merger is when two galaxies of similar size and mass combine, producing a new galaxy of a differing structure to the original galaxies. (CHAPTER 16)