Thread: atmosphere

gravity is not responsible for atmosphere. something else is.i was wondering what it was?

Gravity is not responsible for the formation of the atmosphere; however, it is responsible for the retention of the atmosphere.

venus is smaller than earth.yet atmospheric pressure is 90 percent of that of earth
what is the relation.even the moon titan has dense atmosphere with a diameter of only about 5500 km.if titan could have such an atmosphere why not mars(as mars is bigger than titan) i just happened to see a reply which says that even if terraformed mars would not be able to retain atmosphere?

A good

Originally Posted by parag1973

gravity is not responsible for atmosphere. something else is.i was wondering what it was?

Much atmosphere comes from volcanic action, as in Titan and Venus (which has lots of sulphur in it's atmosphere. It also depends what it can hang onto and gravity/density helps in this. With the Earth we have the Moon which must be slowly leeching our atmosphere away.

Wouldn't the gases from the sun be responsible for the atmosphere? I mean the fusion of hydrogen... The fusion to create all other elements of less atomic mass than iron? Plus, the solar wind blows it. Then, the Earth catches some of it? ATOMOSPHERE! Or... plants came into existence millios of years ago, converted the CO2 to O and C2. Then the fish evolved got out of water and then you know. But, that parts for another topic.

Originally Posted by parag1973

venus is smaller than earth.yet atmospheric pressure is 90 percent of that of earth what is the relation.

Venus is smaller than the earth, yes, but it has about the same gravity.

even the moon titan has dense atmosphere with a diameter of only about 5500 km.if titan could have such an atmosphere why not mars(as mars is bigger than titan) i just happened to see a reply which says that even if terraformed mars would not be able to retain atmosphere?

Titan has all sorts of interesting volcanoes and things to add gasses to the atmosphere from within the planet. As for terraforming Mars, it's true that any atmosphere that we added would eventually be lost, but it would take millions of years. People normally think of terraforming as a project that would last hundreds or thousands of years, so it wouldn't really be a problem.

one of the primary goals of astronomy and astrophysics is to understand how galaxies form and evolve. this addresses the natural desire to understand the physical origin of our milky way galaxy and the wide range of galaxy types we see around us. galaxies are also the building blocks of the universe, so understanding how they form and evolve is a major step towards understanding the development of structure in the universe. . globular clusters are ideal fossil records of the formation history and mass distribution of galaxies, and wiyn imaging and spectroscopic studies of these system will constrain models of galaxy formation and dark matter halos. yale astronomers are also leading hst programs to help answer these questions. other wiyn programs are aimed at determining the metallicity distribution of stars within nearby galaxies, and at delineating the physical mechanisms underlying starbursts in nearby galaxies.

------------------------
aniecruz



ethical