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Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but are unlike any in our own solar system.
The two exoplanets , or planets outside of our solar system, orbit a star called TOI-1453, which is slightly cooler and smaller than our sun . Located about 250 light-years from Earth in the Draco constellation, TOI-1453 belongs to a binary stellar system ⁘ in which a pair of stars orbit each other.
Classified as a super-Earth and a sub-Neptune, these two new celestial bodies are among the most common types of exoplanets found in the Milky Way galaxy, yet are absent from our own solar system .
TESS hunts for exoplanets by looking for a temporary decrease in a star's brightness, also known as the transit method. When a dip in brightness is observed, that suggests a planet has passed in front of its host star (from our perspective on Earth) and briefly blocked the star's light from reaching our instruments. By measuring this effect, astronomers can estimate the size and orbital period of the possible exoplanet as well.
"The two planets present an interesting contrast in their characteristics," Manu Stalport, first author of the study and an astrophysicist at the University of Li⁘ge, said in the statement . "TOI-1453 b is a super-Earth, slightly larger than our planet, and probably rocky. It completes its orbit in just 4.3 days, making it a very close planet to its star."
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