All posts tagged: Jupiterlike

Jupiter-like exoplanet helping scientists rethink how solar systems form

Jupiter-like exoplanet helping scientists rethink how solar systems form

A planet so distant that its starlight began traveling toward Earth around the Middle Ages has given one University of Cincinnati graduate student the kind of first look astronomers wait years for. Last fall, Paul Smith sat up through the night as data from the James Webb Space Telescope started appearing on his computer. Webb, orbiting about a million miles from Earth, had been pointed at TOI-2031A, a faint star 901 light years away. If the team’s calculations were right, the giant planet circling that star would pass in front of it during their narrow observation window, letting them examine its atmosphere in unusual detail. For Smith, who leads data analysis for the project’s first planet, the moment felt personal as well as scientific. “It was a lifelong dream of mine coming true. I was up all night to get the first look at the data,” he said. Paul Smith, pictured with the Cincinnati Observatory’s historic telescope, is using geology and physics tools to study exoplanets light years from Earth. (CREDIT: Connor Boyle/UC Marketing + …

Astronomers find thick water-ice clouds on Jupiter-like exoplanet Epsilon Indi Ab

Astronomers find thick water-ice clouds on Jupiter-like exoplanet Epsilon Indi Ab

A giant planet circling a nearby star has given astronomers a rare look at what a colder, more Jupiter-like world can be like, and the picture is already messier than many models expected. The planet, called Epsilon Indi Ab, sits far enough from its star to avoid the blistering heat seen on many giant exoplanets studied so far. That alone makes it unusual. Most worlds whose atmospheres have been examined in detail orbit much closer to their stars, which makes them easier to detect but also much hotter than Jupiter. Epsilon Indi Ab is different: cold, massive, and dim, with a temperature estimated at roughly 200 to 300 Kelvin, or about minus 70 to plus 20 degrees Celsius. That places it much closer to the kind of giant planet astronomers have long wanted to study. It is not a twin of Jupiter, but it is one of the nearest things yet to a true analogue. The new observations suggest that its atmosphere may contain thick, patchy water-ice clouds, a finding that helps explain why the …