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Astronomy Final Project

Across
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)
Down
The Great Red ____ is a massive storm on Jupiter that has raged for over 300 years. (CHAPTER 7)
Astronomer William _____ discovered the planet Uranus in the year 1781. (CHAPTER 7)
On Mars, there are _____ channels which indicate the presence of ancient Martian rivers. (CHAPTER 6)
A type of galaxy with no spiral arms that typically lacks active star-formation and makes up most of the mass from galaxies. (CHAPTER 15)
A type of telescope that focuses light via lenses that bend the light. (CHAPTER 3)
The ________ meteorite carried relatively large amounts of organic material and amino acids while in outer space. (CHAPTER 18)
The surface part of the Sun that emits the radiation we see. (CHAPTER 9)
The ___________ radius is the radius an object would have to be compressed to for it to become a black hole. (CHAPTER 13)
Massive stars ranging from 100-1000 solar radii. (CHAPTER 10)
A predominately icy body that develops a "tail" when near the Sun. (CHAPTER 4)
The precursor to a star, mainly emitting radiation in the infrared range. (CHAPTER 11)
When the innermost core of a star survives a Type II supernova intact, typically all that remains is a compressed ball of neutrons. This type of object is called a ______ star. (CHAPTER 13)
The point in a planet's orbit at which it is closest to the Sun. (CHAPTER 1)
A Type II ________ is rich in hydrogen and tends to have a plateau in its luminosity before a sudden drop. (CHAPTER 12)
The ______ density is the density the universe would need to be for gravity alone to resist its expansion. (CHAPTER 17)
A category of active galaxy that resembles a normal spiral galaxy save for in its nucleus, which can be up to 10000 times brighter than the Milky Way's own nucleus. (CHAPTER 15)
The galactic ____ of the Milky Way is near the galactic center, having both a high stellar density and active star-formation. (CHAPTER 14)
Large, dark areas on the moon that ancient astronomers thought resembled Earth's seas. (CHAPTER 5)