August 21, 2017 will mark the biggest solar event of the summer, a coast-to-coast solar eclipse.
"If you want to see the really cool part, called 'totality,' you need to be in the 65-mile wide shadow that's going to go from the northwest down to the southeast," Solar eclipse expert Mike Ford said.
In the areas that will experience the totality, viewers will be able to see the corona of the sun, the bright planets and the bright stars.
Without a total eclipse, the corona of the sun is impossible to see.
Since the sun is about 100,000 times brighter than the full moon, special solar eclipse glasses prevent viewers from going blind while watching the eclipse.
Due to the rarity of the 2017 eclipse, large groups of people are expected to travel to the areas where the totality can be seen.
Are you in the path of totality? Click here to see NASA's map of what you'll see in the sky on August 21st.