The mass of an average comet's nucleus is about 1.0 ✕ 1014 kg. If the Oort cloud contains 2.0 ✕ 1011 comet nuclei, what is the mass of the cloud in units of Earth masses? (Note: Earth's mass is 5.97 ✕ 1024 kg.) ________ m Compare that with Uranus's mass. (Note: Uranus's mass in units of Earth's mass is 14.5 M.) mass of the Oort Cloud / mas of Uranus =________

Annual meteor showers occur when the Earth passes through the orbital path of acomet. The intensity of these showers vary from year to year. Which of the following may bethe reason for this? Group of answer choices - Meteor showers are not caused by comet debris - Sun's temperature - en distribution of debris along comet's orbit - Earth's rotation axis

Why is the composition of a comet typically dominated by volatile materials (frozen ices)? choose one of the following: a. rock and metal could not condense out of the solar nebula at extreme distances from the sun b. most of the metal in the solar system is locked up inside the terrestrial planets c. metals are not stable in the outer solar system d. elements that form ices (as opposed to rock & metals) are more abundant in our solar system

If the velocity of the Solar Wind about 4.0 x 10^2 km/s and the visible tail of a comet of 9.0 x 10^8 km long, how many days does an atom in the solar wind take to travel from the nucleus to the end of the visible tail? (note: 1 day= 86,400 sec) _______ days