The force of attraction, or pull, between any two objects.

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# The force of attraction, or pull, between any two objects. - PowerPoint PPT Presentation

The force of attraction, or pull, between any two objects. What is gravity?. One complete trip around the Sun. What is a revolution?. This is how long it takes Earth to make one revolution around the Sun. What is 365.25 days?. This is how long it takes Earth to make one rotation on its axis.

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What is through the use of space probes (a vehicle carrying instruments sent to explore objects in space) and rovers (small robot cars)?

Draw a picture of these four galaxies: ovoid elliptical, irregular, disc-shaped elliptical, and spiral.

Ovoid Elliptical

http://jtgnew.sjrdesign.net/images/galaxies_elliptical_ngc1132_hst.jpg

Irregular:

532px-Irregular_galaxy_NGC_1427A_(captured_by_the_Hubble_Space_Telescope).jpg

Disc-shaped elliptical:

http://mainahalim.files.wordpress.com/2011/01/sombrero-galaxy.jpg

Spiral: