Our Solar System
This star sits at the center of our solar system.
The Sun
This is the phase when the Moon appears completely illuminated.
Full Moon
This is the name of the galaxy that contains our solar system.
The Milky Way
This astronaut was the first person to walk on the moon on this year.
Neil Armstrong, 1969
This instrument collects and magnifies light from distant objects.
Telecope
This largest planet in the solar system is famous for its Great Red Spot.
Jupiter
The Moon goes through this many distinct phases in one full cycle.
8 (16 total)
This theory says the universe began from an extremely hot, dense state about 13.8 billion years ago.
This orbiting laboratory has been continuously occupied by astronauts since 2000.
The International Space Station
In 1668, this English scientist built the first practical reflecting telescope.
Isaac Newton
In 2006, Pluto was reclassified as one of these, a category that also includes Ceres and Eris.
A dwarf planet.
This creature howls at a full moon.
Werewolves.
About 2.5 million light-years away, this large neighbor galaxy is on a collision course with ours.
Andromeda Galaxy
This NASA telescope, launched in 1990 and repaired by shuttle astronauts, has captured iconic deep-space images.
Hubble Space Telescope
Galileo's first telescopes used lenses to bend light, which made them this type of telescope.
Refractor/Refracting Telescope
This planet is the hottest in the solar system.
Venus
The Moon's gravity is the main cause of these daily rises and falls of the oceans.
Tides
The boundary around a black hole, beyond which nothing can escape, is called this.
The Event Horizon
This 1970 mission was aborted after an oxygen tank exploded, yet all three astronauts made it home safely.
This man was the commander of that mission.
Apollo 13
Jim Lovell
The James Webb Space Telescope mainly observes this type of light, which humans feel as heat.
Infared
This moon of Jupiter is the most volcanically active body in the solar system.
Io
The darkest part of a shadow, where a total eclipse is seen, is called this.
Umbra (umbrae and umbral accepted)
A supermassive black hole at the center of the Milky Way goes by this name.
Sagittarius A*
Launched in 1977, this NASA probe is now the farthest human-made object from Earth, in interstellar space.
Voyager 1
This is how many miles in a light year.
5.9 trillion miles