The Formation of the Solar System

Asteroids lack the specific amount of mass required to form a spherical shape.

The gas tail vaporizes when going from the cold Oort cloud to the hot sun and is pointed away by the solar wind, while the dust tail leaves a trail following the comet.

Terrestrial planets are smaller, rocky, and have a high density, while gas giants are much larger, composed mostly of gases, and have a low density.

<p>Probes can visit multiple planets, collect information and images, and send them to Earth, while telescopes can only observe from a fixed location.</p> Signup and view all the answers

<p>Human missions require a lot of supplies to support human life, and the risks involved are higher, including the risk of failure and the risk to human life.</p> Signup and view all the answers

<p>About 99.8%</p> Signup and view all the answers

<p>Nuclear fusion</p> Signup and view all the answers

<p>Inner planets are made of metals and silicates, while outer planets are primarily gas and ice.</p> Signup and view all the answers

<p>A region of space with 100,000 sparsely distributed asteroids, located between Mars and Jupiter.</p> Signup and view all the answers

<p>Asteroids are objects in space, while meteors are asteroids that enter the Earth's atmosphere and burn up.</p> Signup and view all the answers