Astronomy Vocabulary Tic tac toe Crossword

When one planet, star, or shadow crosses in-front of another, cutting off the light from the second body (e.g. an eclipse of the sun by the moon, or one star in a binary system eclipsing the other).
The plane of Earth's orbit about the Sun.
One of the three states of matter, in which atoms, molecules, or ions move freely and are not bound to each other. In astronomy, it usually refers to hydrogen or helium.
Oval. That the orbits of the planets are ellipses, not circles, was first discovered by Johannes Johannes Kepler the careful observations by Tycho Brahe
a wavelike bending of space generated by the acceleration of massive bodies
The lightest and most abundant element. A hydrogen atom consists of one proton and one electron. Hydrogen composes about 75% of the mass of the Sun, but only a tiny fraction of the Earth.
a planet's orbit has an ellipse shape that travels around one star
The line connecting the Sun to a planet sweeps equal areas in equal times.
orbital period squared = (a ratio of) the longest radius of the orbit cubed.
magnetic field
A word used for any kind of stuff which contains mass.
A measure of the total amount of material in a body
The National Aeronautics and Space Administration, founded in 1958 as the successor to the National Advisory Committee for Aeronautics.
The imploded core of a massive star produced by a supernova explosion
English cleric and scientist; discovered the classical laws of motion and gravity