Planetary Sciences
The huge red spot on Jupiter.
What is the Great Red Spot?
The science of looking for life on other planets.
What is astrobiology?
Our sun is this type of star.
What is a main-sequence star?
Our home galaxy is called this.
What is the Milky Way?
The main theory for how the universe began.
What is the Big Bang?
This planet is so hot that it could melt metal.
What is Venus?
A chemical (like oxygen) that could be a sign of life on another planet.
What is a biomarker?
The process that makes stars shine.
What is nuclear fusion?
The closest major galaxy to us.
What is the Andromeda galaxy?
The ancient light left over from the very beginning of the universe.
What is the Cosmic Microwave Background?
This planet has the most famous and beautiful rings in our solar system.
What is Saturn?
This equation helps scientists guess how many alien civilizations might be in our galaxy.
What is the Drake Equation?
What a large, massive star does when it explodes at the end of its life.
What is a supernova?
The huge black hole at the center of our galaxy.
What is Sagittarius A*?
The invisible stuff that makes up most of the universe's mass.
What is dark matter?
This theory says our moon was made from a giant crash between Earth and another planet.
What is the Giant-impact hypothesis?
This NASA rover is looking for signs of ancient, tiny living things on Mars.
What is Perseverance?
A diagram that shows how bright stars are compared to their temperature.
What is a Hertzsprung-Russell (HR) diagram?
Our galaxy is shaped like this, with arms that curve around.
What is a spiral galaxy?
The mysterious force that is making the universe expand faster.
What is dark energy?
The area around a star where liquid water could exist.
What is the habitable zone?
A living thing that can survive in very extreme places.
What is an extremophile?
A very dense, fast-spinning star that sends out beams of light.
What is a pulsar?
A large group of galaxies is called this.
What is a galactic cluster?
What Edwin Hubble discovered about the universe in the 1920s.
What is the expansion of the universe?