Astronomy Crossword
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
                                     
 
 
Down: 1) Gravity causes solar nebula to collapse toward dense, hot, rotating protostellar disk. (which step?)2) Heliocentric. I was a Danish astronomer. I measured the motion of planets.3) What is NH3?5) Planets form. (which step?)6) I was a Greek astronomer and mathematician. I proposed heIiocentric but it was not accepted. I solved the parallax problem.7) On which planet is a day longer than a year?8) Comets can be found here.10) Heliocentric. I was a Polish astronomer. I am responsible for the order of the planets today.16) Located beyond Neptune and contains small bodies of ice.20) Geocentric. I was a Greek-Roman astronomer, geographer, and mathematician. 23) What is the density of water?25) The pull of gravity on atoms, planets, and stars makes everything ________. Across: 4) Planetary orbits are ellipses with the sun at one focus.9) Located between Mars and Jupiter.11) Planetismials form (small body from which a planet originated. (which step?)12) Planets move faster when closer to the sun.13) Distance of a planet from the sun to the time it takes to revolve is related.14) Heliocentric and elliptical. I was a German mathematician and astronomer. I am responsible for the 3 laws of planetary motion.15) What 2 planets have retrograde rotation?17) As the distance between 2 objects increases, the force of gravity _________.18) Geocentric. I was a Greek philosopher and thought the earth wasn't moving.19) Sun forms in center. (which step?)21) What is CH4?22) Because it is made up of gases and it is not a solid, the sun has __________________.24) Heliocentric. I was an Italian mathematician, physicist, and astronomer. I used the scientific method.26) When looking at 3 different stars, which one would have the greatest parallax?
 

 

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