Stars
An exploding star is a __________.
nova or supernova
A celestial body moving in an elliptical orbit around a star is called a _______.
planet
A region of space having a gravitational field so intense that no matter or radiation can escape is called a _____ _____.
black hole
A meteoroid becomes a meteor when it _______ ___ _______ ____________.
enters the Earth's atmosphere
What is at the center of The Milky Way galaxy?
a giant black hole
The brightest star in our sky is called _______.
Sirius
A __________ _________ is one with little or no atmosphere, likely a result of proximity to a star. The remaining rocky or metallic core would resemble a terrestrial planet in many respects
Chthonian planet
A black hole is created when ____________________.
answers will vary (when massive stars collapse at the end of their life cycle)
What is a meteorite?
a meteor that lands
How long does it take light to travel from Proxima Centauri to Earth?
4.2 years
Earth's current north star is called ________.
Polaris
A ________ ________ is the right distance from its Sun to allow temperatures for liquid water.
Goldilocks planet
A _________ is a hypothetical structure connecting disparate points in spacetime, and is based on a special solution of the Einstein field equations.
wormhole
Name the three parts of a comet.
nucleus, coma, tail
The nearest galaxy to the Milky Way is __________.
Andromeda
The closest star to our sun is called ______________.
Proxima Centauri
A ____ _______ is a type of terrestrial planet, with a surface mostly or entirely covered by molten lava.
Lava planet
The wormhole theory came from Einstein's ________ of ___________.
Theory of Relativity
Large numbers of _________, ranging in size from nearly 600 miles (1,000 km) across to dust particles, are found, especially between the orbits of Mars and Jupiter, though some have more eccentric orbits, and a few pass close to the earth or enter the atmosphere as meteors.
asteroids
99.999% of atoms is made of _____ _____.
empty space
Neutron stars have two classifications. They are _______ and __________
Pulsars and Magnetars
It might sound like a sci-fi concept, but in fact, scientists have discovered a planet that is believed to be made almost entirely of ________. The planet, which is officially known as 55 Cancri e
diamonds
Stephen Hawking's famous book about black holes is called _ _____ _______ __ ____.
A Brief History of Time
The largest asteroid is called ______.
Ceres
How old is the universe?
13.7 billion years old with an uncertainty of 200 million years