Our Star, The Sun
Deep Space & Cosmic Objects
Cosmic Scales & Distances
Space Exploration
Planetary Science & Orbits
100

The process in the Sun's core where hydrogen atoms smash together to create helium, releasing massive amounts of energy.

 What is nuclear fusion?

100
A massive region in spacetime with gravity so incredibly strong that not even light can escape it.

What is a black hole?

100
The distance that light travels in one full year, used to measure distances between stars and galaxies.

What is a light-year?

100

The massive telescope orbiting Earth that takes incredibly detailed pictures of deep space, helping scientists research distant planets and galaxies.

What is the Hubble Space Telescope?

100

The scientific term for the oval-shaped, non-circular path that planets travel in around the Sun.

 What is an elliptical orbit?

200

Cooler, darker areas on the surface of the Sun caused by magnetic disturbances.

 What are sunspots?

200
The name of the specific galaxy that the Milky Way Galaxy is currently on a collision course with.

What is the Andromeda Galaxy?

200

The distance from the Earth to the Sun, which is used as a standard measurement unit inside our solar system.

What is an Astronomical Unit (AU)?

200

The historic NASA space mission that first successfully landed humans on the Moon in 1969.

What is Apollo 11?

200

The two invisible forces of the universe that work together to keep planets in a stable orbit around the Sun.

What are gravity and inertia?

300

A flash of high-energy radiation that bursts from the Sun, sometimes disrupting radio communications on Earth.

 What is a solar flare?

300
Gigantic, glowing clouds of dust and gas in space where new stars are born.

Answer: What is a nebula?

300
The approximate age of our universe.

What is 13.8 billion years?

300

The name of the incredibly powerful successor to the Hubble Space Telescope launched by NASA to study the very first stars.

 What is the James Webb Space Telescope (JWST)?

300

The reason we experience distinct seasons on Earth, rather than our distance from the Sun changing.

What is the tilt of the Earth's axis?

400
The outermost atmosphere of the Sun, which is only visible to the naked eye during a total solar eclipse.

 What is the corona?

400
The most common type of star in the universe, which burns hydrogen very slowly and appears red.

Answer: What is a red dwarf?

400

The famous theory that states the universe began as a tiny, extremely dense point and has been expanding ever since.

What is the Big Bang Theory?

400

The type of energy emitted by black holes or stars that space rovers look for when determining if life could have existed on a planet.

What is electromagnetic radiation (or light)?

400

The only dwarf planet located in the inner solar system, named after an ancient deity of planting and harvests.

What is Ceres?

500

The measurement of time it takes for light from the Sun to travel to Earth.

What is about 8 minutes?

500
Extremely energetic and distant explosions in the universe that flash massive bursts of gamma rays.

What are Gamma Ray Bursts?

500

The name of the phenomenon where light from distant galaxies stretches out and shifts toward the red end of the spectrum because they are moving away from us.

What is redshift?

500

The international orbiting laboratory where astronauts live and conduct microgravity astrophysics and biology experiments.

What is the International Space Station (ISS)?

500

The four large, freezing planets at the outer edges of our solar system, classified as gas giants and ice giants.

What are Jupiter, Saturn, Uranus, and Neptune?

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