A celestial body moving in an elliptical orbit around a star.
What is a planet?
100
An artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
What is a satellite?
100
A fixed luminous point in the night sky that is a large, remote incandescent body like the sun.
What is the sun?
100
A small rocky body orbiting the sun.
What is an asteroid?
100
Longer than a year.
What is a day on venus?
200
A celestial body that has a orbit but hasn't cleared its orbit of debris.
What is a dwarf planet?
200
Sputnik 1
What was the first satellite?
200
A group of stars that make an imaginary shape in the night sky.
What is a star constellation?
200
A celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
What is a comet?
200
More than one million.
How many earths can fit in the sun?
300
Mercury
What is the smallest planet in our solar system?
300
Over 2,500
How many satellites are in orbit?
300
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
What is a galaxy?
300
A small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
What is meteor?
300
400 billion
How many stars are in the Milky Way?
400
Jupiter
What is the largest planet in our solar system?
400
The moon
What is the earth's natural satellite?
400
VY Canis Majoris
What is the largest star?
400
A meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground. More than 90 percent of meteorites are of rock, while the remainder consist wholly or partly of iron and nickel.
What is meteorite?
400
14 billion years
How old is the universe?
500
The "habitable zone"
What is the zone called where life might be able to live?
500
The "Space Race"
What was the race called to get the first man on the moon between the soviet union and the U.S.?
500
NGC 6872
What is the biggest galaxy?
500
A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.