Its name derived from its appearance as a dim glowing band arching across the night sky in which the naked eye cannot distinguish individual stars.
What is the Milky Way?
100
The only other planet that may have had liquid water on it.
What is Mars?
100
Most geologically active object in the solar system.
What is Io?
100
A supernova remnant and pulsar wind nebula in the constellation of Taurus. Observed by Parsons in 1840, who drew an image of what its now-current name looks like.
What is the Crab Nebula?
100
This is the only short-period comet that is clearly visible to the naked eye from Earth.
What is Halley's comet?
200
This star has the brightest apparent magnitude as seen from Earth.
What is Sirius?
200
This planet has an anticyclonic storm that is believed to have been in existence for over 400 years.
What is Jupiter?
200
Largest satellite in the solar system relative to the object it orbits.
What is Earth's Moon?
200
A diffuse nebula in the Milky Way. It is one of the brightest nebulae. This nebula contains a young open cluster known as the Trapezium.
What is the Orion Nebula?
200
Not a planet, but a dwarf planet. Most massive of the dwarf planets and has only one known moon.
What is Eris?
300
With its apparent magnitude at zero, astronomers use this star to represent the magnitude of zero at all wavelengths.
What is Vega?
300
The only planet where we cannot see its surface from Earth. Its surface has only been measured using radar data.
What is Venus?
300
Largest moon in the solar system and the only known moon to have a magnetosphere.
What is Ganymede?
300
This nebula holds the Pillars of Creation.
What is the Eagle Nebula?
300
This is a galaxy that is a satellite of the Milky Way Galaxy.
What is the Large Magellanic Cloud?
400
Two spiral galaxies in the constellation Coma Berenices. Their name refers to the long tails produced by tidal action.
What are the Mice Galaxies?
400
This planet has a persisting hexagonal cloud pattern on its northern pole.
What is Saturn?
400
Only natural satellite with a dense atmosphere.
What is Titan?
400
A reflection nebula that is in front of the Pleiades Star Cluster in the interstellar medium.
What is the Maia Nebula?
400
A theoretical spherical cloud of icy planetesimals believed to orbit the Sun at a distance up to around 100,000AU.
What is Oort Cloud?
500
An elliptical galaxy in the constellation Centarus. The center of this galaxy contains a supermassive black hole with a mass equivalent to 55 million solar masses, which ejects a relativistic jet.
What is Centaurus A?
500
This planet has the fastest winds.
What is Neptune?
500
This moon and its body that it orbits are gravitationally locked to each other.
What is Charon?
500
This is the remnant of a Type 1a Supernova that burst in early November of 1572. Also known as SN 1572.
What is Tycho's Supernova?
500
This is a star that had a massive explosion in the 1800s in which it lost about 30 solar masses of its 150 solar masses. During this great explosion, it was almost as bright as Sirius.