Astronomy | Astrophysics Answers

objects in the elliptical orbit the position farther from the gravity source is called the apogee and the position nearer is called perigee. what are the speeds of the two objects

Why is Saturn almost as big as Jupiter, despite its smaller mass

on which fundamental law of physics is keplers second law is based

The Mass of our sun is 2x10^30 kg. Its radius is about 7x10^8 m. If our sun was to collapse into a black hole (all the mass is concentrated into a single point), what would be its event horizon? The event horizon is the edge at which light, which travels at 3x10^8 m/s can not escape.

If photon's have no mass why is light "bent" by gravity? Again, if photon's have no mass why can't they escape the pull of a black hole?

You are on a treasure hunt and your map says "Walk due west for 57.1 paces, then walk 70.0 ° north of west for 71.3 paces, and finally walk due north for 64.6 paces." What is the magnitude of the component of your displacement in the direction (a) due north and (b) due west?

http://edugen.wileyplus.com/edugen/courses/crs3976/art/qb/qu/c01/w1502int.gif

what would be the period of a planet whose orbit has a semimajor axis of 4 au?

what is the eccentricity of the orbit of a planet whose distance from the sun varies from 180 million to 220 million km? explain please

What, if anything, existed before the 'Big Bing' and what started the 'Big Bang'?

If the masa of the sun deacreases gravity is earth moving away from sun beacause of deacreases in the gravity of sun