Exoplanets - NASA Science
We know there are more planets than stars in the galaxy. By measuring exoplanets’ sizes (diameters) and masses (weights), we can see compositions ranging from rocky (like Earth and Venus) to gas-rich (like Jupiter and Saturn).
The nearest potentially habitable planet to Earth – Exoplanet ...
2015年12月16日 · UNSW Australia astronomers have discovered the closest potentially habitable planet found outside our solar system so far, orbiting a star just 14 light-years away. The planet, more than four times the mass of the Earth, is one of three that the team detected around a red dwarf star called Wolf 1061.
The Hunt Is on for Closest Earth-like Planets
2019年3月26日 · In a system with two known planets, astronomers spotted something new: a small object transiting across the Sun-sized star. This turned out to be another planet: extra hot and Earth-sized.
Webb Confirms Its First Exoplanet – Exoplanet Exploration: Planets ...
2023年1月11日 · Researchers confirmed an exoplanet, a planet that orbits another star, using NASA’s James Webb Space Telescope for the first time. Formally classified as LHS 475 b, the planet is almost exactly the same size as our own, clocking in at 99% of Earth’s diameter.
Discovery Alert: A 'Super-Earth' in the Habitable Zone
2024年1月31日 · The discovery: A “super-Earth” ripe for further investigation orbits a small, reddish star that is, by astronomical standards, fairly close to us – only 137 light-years away. The same system also might harbor a second, Earth-sized planet.
Eight nights of Exoplanet Light – Exoplanet Exploration: Planets …
2022年12月14日 · The bright moving spot is 51 Eridani b, the most Jupiter-like exoplanet ever imaged, about 100 light-years from Earth. A series of images taken over three years, beginning December 2014, shows a small fraction of this gas planet’s 41-year orbit around its Sun-like star. 51 Eridani b is still young enough that it glows from the heat of its birth.
Seeing, Believing: 15 Years of Exoplanet Images
2023年12月12日 · If we find an “Earth-like” planet, we won’t see continents and oceans – at least not yet. But that tiny dot of light will contain a flood of information: details of the planet’s atmosphere, clouds, temperature, and perhaps even signs of some form of life.
Hubble Uses Earth as a Proxy for Identifying Oxygen on Potentially ...
2020年8月6日 · Taking advantage of a total lunar eclipse in January 2019, astronomers using NASA's Hubble Space Telescope detected ozone in Earth's atmosphere. This method serves as a proxy for how they will observe Earth-like planets transiting in front of other stars in search of life. Credits: M. Kornmesser (ESA/Hubble), NASA, and ESA. News | August 6, 2020
Mars-size planet orbits distant star - Exoplanet Exploration
2015年6月16日 · Scientists measured both the size and mass of a small planet orbiting a star some 200 light years away--a first for an exoplanet smaller than Earth.
Exoplanet Program: ExEP In Depth - Exoplanet Exploration
2016年11月18日 · Ultimately, we aim to discover and characterize Earth-like planets around our nearest neighbors, search for habitable conditions on those planets, and uncover signatures of life.