Stars
The Sun is this type of star.
What is a main-sequence star? (*Bonus 100 points if you said G-type)
This planet's red color is caused by iron based minerals.
What is Mars?
Nearest large galaxy to the Milky Way which is likely to collide with us in roughly 4.5 billion years.
What is the Andromeda Galaxy?
This theory suggests that the universe started as an extremely hot, dense point almost 14 billion years ago and has been expanding since.
What is the big bang?
What are sunspots?
A cloud of gas and dust where stars may form.
What is a nebula?
This planet has a magnetic field which does not align with its poles and rotates sideways due to its abnormal axial tilt.
What is Uranus?
Galaxy classification tool which groups galaxies into elliptical, lenticular, spiral, or barred spiral based on how they look.
What is the Hubble Tuning Fork?
The "surface" of a black hole where the velocity needed to escape exceeds the speed of light.
What is the event horizon?
This method of calculating distance involves using the apparent shift of an object's position. It is best for bodies within 100 parsecs (not accounting for modern space telescopes like Gaia)
What is parallax?
A (theoretical) body which absorbs all electromagnetic radiation. Stars are approximated as these in order to understand their temperature and spectra.
What is a blackbody?
This planet is known for having a strange hexagonal feature at its north pole.
What is Saturn?
Galaxy with intense periods of star formation (10-100 times higher), thought to be caused by gravitational disruptions.
What is a starburst galaxy?
Roughly 400 million to 1 billion years after the Big Bang, the development of stars and galaxies produced intense radiation which caused something to happen to atomic hydrogen. This is known as...
What is re-ionization (or the epoch of re-ionization)?
The James Webb Space Telescope observes in this part of the electromagnetic spectrum.
What is infrared (IR)?
Curves on the H-R diagram which show the evolution of a star from its protostar (pre main-sequence) phase onto the main-sequence.
What are Hayashi-Henyey tracks?
This Galilean moon is a prime example of tidal heating, causing it to have extreme volcanic and geological activity
What is Io?
Holds galaxies together and makes up roughly 80% of the galactic halo.
Supermassive black holes at the center of a galaxy with a massive accretion disk and jets. They are so luminous that they outshine the galaxy.
What is a quasar (or AGN)?
Star systems or satellite galaxies which have been gravitationally pulled apart by the Milky Way's gravity and spin form this long filament-like structure. An example would be the Sagittarius dwarf galaxy.
What are stellar streams?
This is the most common type of star in the Milky Way, making up roughly 75% of our stellar population with a lifespan of around 14 TRILLION years.
What is a (M-type) red dwarf?
One of Jupiter's moons known for it's potential subsurface saltwater ocean, making it a prime candidate in the search for a life. A specialized spacecraft launched in 2024 is currently heading here.
The largest satellite galaxy orbiting the Milky Way (visible from the Southern Hemisphere of Earth)
The process in which virtual particle pairs at the event horizon cause microscopic black holes to "evaporate"
What is Hawking radiation?
This infrared space based telescope (which also has a coronagraph) is set to launch in the summer of 2026, and it is named after a scientist known for her legacy working on the Hubble Space Telescope
What is the Nancy Grace Roman Space Telescope?