Others
The Sun
The Sun is the center of our solar system, our local star.
The temperature of the Sun's visible yellow disk, the photosphere, is about 9,900°F (5,500°C).
Over the photosphere, there are layers of hotter gas, the chromosphere and corona.
The thin gas in the corona is at about a million degrees.
Every minute, the Sun converts 240 million metric tons of mass into energy.
The Moon
About 239,000 miles (384,000 km) away from earth.
Next to the Sun it is the brightest object in our sky,more than 2,000 times as bright as Venus.
Even without a telescope, we can see large areas on the Moon that are darker than the rest, first thought to be sees.
The so-called" seas" are plains of volcanic rock where molten lava flowed into huge depressions caused by giant meteorites, then solidified.
Volcanic activity on the moon ceased about two billion years ago.
Pluto
Once a planet, now considred a dwarf planet.
One of 5 dwarf planets in our solar system, closest to Neptune.
Discovered in 1930 as the result of a systematic search by an American astronomer.
We realized that Pluto was much smaller than we had originally thought.
It has only one-fifth the mass of our Moon.
The first spacecraft ever to be sent to Pluto, New Horizons, was launched in 2006 and flew by Pluto in 2015.
