Science

Planet Web Quest

Our sun is a star located at the center of our Solar System. It is a huge, spinning ball of hot gas and nuclear reactions that lights up the Earth and provides us with heat.

**The Core** : The Sun's core has a tremendously high temperature and pressure. The temperature is roughly 15 million °C.

**The Chromosphere** **The Photosphere** :the part that we see **The Corona** : This is the outer layer of the Sun's atmosphere. About 1,300,000 Earths could fit inside the Sun!!!

**Solar Eclipses**
A solar eclipse happens when the moon blocks our view of the sun. This happens when the Moon is exactly between the Sun and the Earth. = **THE MOON** = The moon is Earth's only natural satellite. The moon is a cold, dry orb whose surface is studded with craters and strewn with rocks and dust. The moon has no atmosphere. Recent lunar missions indicate that there might be some frozen ice at the poles.

The moon revolves around the Earth in about one month (27 days 8 hours). It rotates around its own axis in the same amount of time. The same side of the moon always faces the Earth; it is in a synchronous rotation with the Earth.

As the moon circles the Earth, the shape of the moon appears to change; this is because different amounts of the illuminated part of the moon are facing us. The shape varies from a full moon (when the Earth is between the sun and the moon) to a new moon (when the moon is between the sun and the Earth).
 * **The Phases of the Moon** ||  ||

A lunar eclipse occurs when the Earth's shadow falls on the moon. Lunar eclipses occur, on average, about every 6 months. = Moon exploration = May 25, 1961, when President John F. Kennedy announced the goal of sending astronauts to the moon before the end of the decade.
 * **LUNAR ECLIPSE** ||
 * Types of Lunar Eclipses**
 * Total Eclipse - When the entire moon enters the Earth's umbra (the darkest part of its shadow), this is called a total eclipse.
 * Partial Eclipse - When only part of the moon enters the Earth's umbra, this is called a partial eclipse.

July 20, 1969, when Apollo 11 commander Neil Armstrong stepped out of the lunar module and took "one small step" in the Sea of Tranquility, calling it "a giant leap for mankind."