The is a natural type of this that revolves around a bigger object.
What is a satellite?
100
Gases near a sunspot sometimes brighten suddenly, shooting outward at high speed.
What are solar flares?
100
Large cloud of gas and dust that contracts under gravitaional force and breaks apart into smaller pieces, each of which might collapse to form a star.
What is a nebula?
100
This galaxy has spiral arms that wind outward for the center.
What is a spiral galaxy?
200
The gas planets in our solar system.
What is Jupiter, Saturn, Uranus, And Neptune?
200
Hollow pits on the surface on the moon.
What are craters?
200
Layer of the suns atmosphere above the photosphere.
What is the chromosphere?
200
Late stage in the life of comparatively low-mass main sequence star in which hydrogen in the core is deleted, the core contracts and temperatures inside the star increase, causing its outer laters to expand and cool.
What is a giant?
200
This Galaxy is shaped like large, three-dimensional ellipses.
What is a elliptical galaxy?
300
These are the rocky planets in our solar system.
What is Mercury, Venus, Earth, And Mars?
300
The moons gravitational pull that causes the rise and fall of the ocean.
What are tides?
300
The lowest layer of the sun's atmostphere which light is given off.
What is the photosphere?
300
Late stage in the life cycle of a comparatively low-mass main sequence star; formed when its core depletes its helium and its outer layers escape into space, leaving behind a hot, dense core.
What is a white dwarf?
300
This galaxy have different shapes and small than other types of galaxies.
What is a irregular galaxy?
400
This planet is the closet planet to the sun in our solar system.
What is Mercury?
400
High tides are lower than normal and low tides are higher than normal.
What is neap tides?
400
Areas on the sun's surface that are cooler and less bright than surronding areas, are caused by the suns magnetic field, and occur in cycles.
What is sunspots?
400
Collapsed core of a supernova that can shrink to about 20 km. in diameter and contains only neutrons in the dense core.
What is a neutron star?
400
The leading theory about the formation of the universe.
What is the big bang theory?
500
The largest planet in our solar system.
What is Jupiter?
500
High tides that are higher than normal and low tides that are lower than normal.
What are spring tides?
500
Outermost, largest layer of the suns atmoshpere; extends millions of kilmoeters into space and has temperatures up to 2 million K.
What is the corona?
500
Final stage in the evolution of a very massive star, where the core's mass collapses to a point that it's gravity is so strong that not even light can escape.