Space Missions & Exploration
This NASA program sent humans to the Moon.
Apollo
This is the fastest thing in the universe
Light
A black hole can theoretically slow down the passage of this for an observer near it
Time
This is the name for a group of stars that appears to form a recognizable pattern in the night sky
constellation
Earth has one of these natural satellites
What is the Moon
This country launched Sputnik 1, the first artificial satellite, in 1957.
the Soviet Union
This is the name for a giant cloud of gas and dust in space
nebula
Astronauts say this common food becomes surprisingly difficult to eat in microgravity because crumbs can float everywhere.
bread
This is what we call a star that suddenly becomes extremely bright because of a massive explosion.
a supernova
Despite being smaller than Earth, this planet has a day longer than its year
What is Venus?
Apollo 13 famously had to abandon its Moon landing after this component exploded.
an oxygen tank
This famous space telescope has given us stunning pictures of distant galaxies and nebulae since the 1990s
Hubble Space Telescope
On this planet, a sunset can appear bluish rather than reddish.
Mars
A star's color can tell astronomers a lot about this property.
It's temperature
This planet has winds that can reach roughly 1,200 mph, making them the fastest known planetary winds.
What is Neptune
Apollo 8 was the first crewed mission to accomplish this around another world
orbit the Moon
This is the name for the mysterious substance that scientists believe makes up much of the universe's matter, even though we can't see it directly
Dark Matter
On this planet, it rains diamonds—at least according to models of its extreme atmosphere
Neptune
The Milky Way is expected to eventually merge with this neighboring galaxy.
Andromeda
Saturn's rings are mostly made of chunks of this substance, ranging from tiny grains to enormous pieces.
Water ice
This Apollo mission was the only one whose crew never made it to the Moon because of an onboard explosion
Apollo 13
If you could somehow put this planet in a bathtub large enough, it would float because its average density is less than water
Saturn
This hypothetical phenomenon could allow a spacecraft to take a shortcut between two distant regions of spacetime.
A wormhole
This type of star is the incredibly dense leftover core of a massive star that exploded as a supernova
neutron star
The enormous canyon system Valles Marineris stretches roughly 2,500 miles across this planet.
What is Mars