Astronomy: Earth's Rotation and Revolution

A rotation is when an object turns around an internal axis, while a revolution is when an object circles an external axis.

The moon rotates and revolves about once every 29 1/2 days.

Earth makes one revolution in about 365.25 days.

<p>The rotation of the Earth causes the oceans to rise and fall due to the Moon's gravity.</p> Signup and view all the answers

<p>The period of rotation of the Earth is approximately 23 hours, 56 minutes, and 4 seconds.</p> Signup and view all the answers

<p>The estimated age of the universe is about 13.772 billion years.</p> Signup and view all the answers

<p>By looking for the oldest stars and measuring the rate of expansion of the universe.</p> Signup and view all the answers

<p>Through nuclear fusion.</p> Signup and view all the answers

<p>A comet is a ball of space dust and ice with a tail.</p> Signup and view all the answers

<p>A meteor is a landed meteoroid.</p> Signup and view all the answers

<p>A meteoroid is a meteoroid still in space.</p> Signup and view all the answers

<p>A meteorite is a meteorite that has entered the atmosphere.</p> Signup and view all the answers

<p>A galaxy is a group of stars and solar systems.</p> Signup and view all the answers

<p>The star's size.</p> Signup and view all the answers

<p>Because of how vast space is, we measure by how long it takes to reach an entity at the speed of light.</p> Signup and view all the answers

<p>A planet collided with ancient Earth and created a subplanet that turned into the moon.</p> Signup and view all the answers

<p>Waxing refers to the increasing visibility of the moon.</p> Signup and view all the answers

<p>Waning refers to the decreasing visibility of the moon.</p> Signup and view all the answers

<p>It's rare when the moon lines up perfectly in front of the sun.</p> Signup and view all the answers

<p>The seasons are caused by Earth's position to the sun.</p> Signup and view all the answers

<p>Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.</p> Signup and view all the answers

<p>The planets spin about their axes in the same direction due to the solar system's formation from a giant cloud of dust.</p> Signup and view all the answers

<p>The vast amounts of hydrogen atoms in the Sun's core are compressed and heated to fuse together in a process called nuclear fusion.</p> Signup and view all the answers

<p>Photosphere, Chromosphere, Transition Region, Corona.</p> Signup and view all the answers

<p>Hydrogen.</p> Signup and view all the answers

<p>The asteroid belt is located roughly between the orbits of Mars and Jupiter.</p> Signup and view all the answers

<p>The star life cycle includes stages such as formation, main sequence, red giant, supernova, and neutron star or black hole.</p> Signup and view all the answers

<p>A lunar eclipse occurs when the Earth is between the sun and the moon, while a solar eclipse happens when the moon is between the sun and the Earth.</p> Signup and view all the answers