Never look directly at the Sun, even for a second! It can damage your eyesight forever!
To view a solar eclipse or Venus transit, use special solar viewing glasses. Get them from a camera store or online.
SUNGLASSES DO NOT WORK, EVEN IF YOU STACK MANY OF THEM TOGETHER.
A transit is when one object crosses in front of another in space. This can happen in a lot of different ways. One example is when the Moon passes between Earth and the Sun. The Moon is “transiting” the Sun. This is also called a solar eclipse.
But the Moon isn’t the only object that can transit the Sun. We can also see the planet Venus when it passes between Earth and the Sun on its orbit. This is called a transit of Venus.
Because of how the orbits of Venus and the Earth line up, we can’t see the transit of Venus very often. The last transit of Venus was on June 6, 2012, but the next one isn’t until 2117!
What about other types of transits? Earth, the Moon and Venus are all in our solar system, and they all transit our Sun. But there are lots of other stars, and many of them have their own planets.
Planets outside our solar system are called exoplanets. If the orbit of a planet is lined up just right, the planet will pass in front of—or transit—the star that it orbits. Looking for transits is one of the ways that scientists find exoplanets. When a transit occurs, the light from the star dims by a very small amount. That dimming can be measured.
The amount of light blocked by the planet tells us how big the planet is compared to its star. The amount of time between each transit tells us about the planet’s orbit. These transits give us a lot of information!
If there is more than one exoplanet orbiting the same star, we can tell them apart by their transits. For example, scientists discovered seven exoplanets around a star called TRAPPIST-1. All seven were found by their transits.