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Across
The force that attracts all objects towards each other.
An eruption of gas from the sun caused by sunspots interacting.
A diagram used to chart the temperature and apparent brightness of stars.
A region of the Solar System between mars and Jupiter filled with asteroids.
A giant ball of mostly hydrogen and helium gas undergoing nuclear fusion.
The average distance between Earth and the sun.
Mercury, Venus, Earth and Mars are small, rocky and close to the sun.
Where you Nincompoops live.
The idea that the moon formed from the collision of earth and another planets sized objects billions of years ago.
The"Red Planet" because of it's iron rich soils. Colder than Earth, but contains water and could support life someday.
Parts of the head of a comet.
Inner layer of the Sun's atmosphere.
Distance light travels in a year.
The process of building something up gradually by gathering smaller pieces.
Star classification running diagonally through the middle of an HR diagram.
These can be spiral, elliptical, or irregular in shape and are made up of billionsof Star systems.
The rock and ice clumping together as a planet first begins to form.
A star system with two stars orbiting each other.
The remains of a dead high mass star. Spinning ones are known as Pulsars.
Down
Loose collections of ice, dust, and particles that orbit the sun in long narrow ellipses.
The hottest planet because of a runaway greenhouse effect.
The center of the sun.
An object orbiting a star with enough gravity to be rounded and clear it's orbit.
How bright a star appears from earth, dimmer stars might just be farther away.
A star in the early stage of condensing from a cloud of dust and gas.
Another name for the inner planets.
Large round pit caused by the impact of meteoroids.
A device that breaks light into it's colors. Used to analyze stars that are far away.
Dark flat areas of the moon.
The outer halo like layer of the sun.
Thin stream of electrically charged particles.
The apparent change in position of an object when you look at it from different places.
The closest Planet to the sun.
The largest planet. has a big red spot that is a hurricane that has been raging for at least 400 years.
A large cloud of dust and gas in space spread out over a far area. Stars form inside these.