Just like how all the planets in our solar system orbit the sun, there are other planets that orbit around other stars and they are called exO exoplanets
Astronomers use other ways to detect and study these distant planets.
When was the first exoplanet discovered?
The first exoplanet, 51 Pegasi b, was discovered in 1995 by Michael Mayor and Didier Queloz.
How many exoplanets have been identified till now?
According to NASA there are 2577 solar systems and out of them confirmed exoplanets there are 3449
Which is the latest one into the exoplanet league?
In May last year, scientists found three planets passing in front of TRAPPIST-1, the dwarf star.
One of the factors that must be satisfied in order to be considered habitable is that exoplanets must orbit within a distance of their stars in which liquid water can exist on the planet's surface, receiving about as much sunlight as Earth.