NASA believes a new world may support life.
 

The space agency told the American Astronomical Society that the 'Earth-sized' planet, the second in a system around a nearby star, could have liquid water.
 

According to NASA, this new planet likely has a 'rocky' shell-like Earth's, making it even more like our bright blue dot.
 

TOI 700 e, the latest discovery by NASA and MIT's Transiting Exoplanet Survey Satellite (TESS), circles the cold dwarf star TOI 700, 100 light years from Earth in the Dorado constellation.
 

Planets d and e in the TOI 700-orbiting system, like their sisters, are Earth-sized and within the star's 'habitable zone,' meaning they might host life and contain liquid water. TESS found an Earth-sized habitable zone planet TOI 700 d.
 

NASA emphasises that finding two such planets in one solar system is rare.

Jet Propulsion Laboratory postdoctoral scholar Emily Gilbert said in NASA's announcement, 'This is one of just a handful systems containing several, small, habitable-zone planets.' That makes TOI 700 an intriguing follow-up.
 

Planet e's discovery was made possible via TESS data.

The TOI 700 system's second Earth-sized exoplanet could help us uncover extraterrestrial life.
 

Planets would remain habitable in the cautious habitable zone. Because a planet's surface temperature dictates whether water may be liquid, these two are separate.
 

'To account for the fact that we know Mars and Venus once had liquid water on their surfaces,' Gilbert said, the habitable zone was enlarged. Astronomers can find more habitable planets in this optimistic zone.

Comparing the four TOI 700 planets is also possible. We know these planets formed from the same disc orbiting the same star. Gilbert said this helps them understand how planet size and habitable zone boundaries affect habitability.

This system, like TRAPPIST, features many Earth-size planets in its habitable zone. The day before, JWST discovered LHS 475 b, another Earth-size solid planet. However, its star is closer and outside the habitable zone. JWST confirmed TESS's exoplanet.
 

Both telescopes should find more exoplanets since the TESS team will keep examining the TOI 700 system's exoplanets.