What is an Oort cloud?

What is an Oort cloud? A. a cluster of asteroids B. a swarm of comets far from the sun C. the cloud a meteor produces in the atmosphere D. the same...

Which best describes a comet?

Which best describes a comet? A. a celestial object consisting of a nucleus of ice and dust and, when near the sun, a "tail" of gas and dust particles...

What is the density of Ice Objects?

What is the density of Ice Objects? A. >5000 kg/m3 B. 2000 kg/m3 C. 1500 or less kg/m3 D. 3000-4000 kg/m3 Answer: B. 2000 kg/...

What is an exoplanet?

What is an exoplanet? A. A planet orbiting around a star other than the Sun B. A planet without moons C. A planet with extraterrestrial life D. A...

Which two planets are known as ice giants?

Which two planets are known as ice giants? A. Jupiter and Pluto B. Uranus and Neptune C. Jupiter and Saturn D. Venus and Uranus E. Neptune and Saturn Answer: B....

Who discovered Uranus?

Who discovered Uranus? A. William Herschel B. Urbain Leverrier C. John Couch Adams D. Johann Galle Answer: A. William Hersch...