The  Sun
The sun is the hottest object in our galaxy. The sun is also a star. Huge balls of gas shoot off the sides an the  top. Sunspots , dark patches on the suns surface , are regions of cooler gas caused by disterbancesin the suns magnetic feild. sunspots have three parts: The Photosphere. This is the visible surface of the sun. The Penumbra. This is the outer part of sunspots. The Umbra. This is the coolest and darkest part of sunspots. When the sun goes behind the moon a solar eclipse is caused. Alougth you can not look directly at the sun there are other ways to veiw a solar eclipse.

 Earth
Mercury
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