Planets
Stars & Galaxies
Space Missions
Constellations
Fun Facts
100
This planet is known as the Red Planet
Mars
100
The closest star to Earth after the Sun
Proxima Centauri (4.25 light years)
(Sun is 1.58×10-5 light-years)
100
First human to walk on the Moon
Neil Armstrong
100
This constellation represents a hunter in Greek mythology
Orion
100
The force that keeps planets in orbit around the Sun
gravity
200
This is the largest planet in our solar system
Jupiter
(approx. 1,300 earths)
200
The brightest star in the night sky
Sirius (magnitude -1.46)
200
First woman in space
Valentina Tereshkova
200
This constellation contains the North Star
Ursa Minor
200
The Sun is primarily made of this gas
hydrogen
300
This planet has the fastest rotation, completing a day in just under 10 hours
Jupiter
(approximately 9hrs 50 mins)
300
This galaxy is on a collision course with the Milky Way
Andromeda (approx. 4 billion years)
300
The spacecraft that first visited Pluto in 2015
New Horizons
300
This constellation contains the brightest star in the night sky, Sirius
Canis Major
300
Time passes more slowly near this type of massive cosmic object due to its strong gravity
black hole
400
This planet's day (rotation) is longer than its year (evolution)
Venus
(243 earth days = 1 day on Venus)
(225 earth days = 1 year on Venus)
400
A type of star that explodes at the end of its life, often briefly outshining entire galaxies
supernova
400
This telescope was launched in 1990 and gave us stunning deep-space images
Hubble Space Telescope
400
This constellation helps you locate the South Celestial Pole in the Southern Hemisphere
Crux (Southern Cross)
400
A neutron star that emits beams of radiation is called this
pulsar
500
This planet was discovered by mathematical prediction before it was seen through a telescope
Neptune
(based on irregularities in Uranus's orbit)
500
The name of the supermassive black hole at the center of the Milky Way
Sagittarius A*
500
Name of the Mars rover that landed in 2021
Perseverance
500
The Crab Nebula, a supernova remnant, lies within this zodiac constellation
Taurus
500
During a total solar eclipse is the Moon at apogee or perigee?
Perigee (closest point to Earth in its orbit)