DIRS.INFO top alerts submit data jurnalism about API
login
Top related persons:
— - 1 Jessie Christiansen - 1 Mark Garlick - 1 NASA's - 1 Christiansen - 1
Top related locs:
Top related orgs:
NASA - 1 Service - 1 JPL - 1 Caltech - 1 Kepler Space - 1 Harvard - 1

Search resuls for: "Jessie Christiansen"


4 mentions found


☆ NASA scientists think some planets are shrinking because powerful radiation from their cores is pushing away their atmospheres
  + stars: | 2023-11-17 | by ( Sebastian Cahill | Morgan Mcfall-Johnsen | ) www.businessinsider.com   time to read: +4 min
Planets beyond our solar system have a size gap, where worlds seem to shrink past a certain range. Scientists think this is because some sub-Neptunes shrink — losing their atmospheres and speeding through the size gap until they are as small as a super-Earth. AdvertisementThe planets themselves may be pushing their atmospheres awayShrinking exoplanets may lack the mass (and therefore the gravity) to hold their atmospheres close. AdvertisementThe other hypothesis, called photoevaporation, says that a planet's atmosphere is dissipated by the radiation of its host star. AdvertisementThe scientists found that most of the planets there retained their atmosphere, making the core-powered mass loss a more likely cause of eventual atmosphere loss.
Persons: —, Jessie Christiansen, Mark Garlick, NASA's, Christiansen Organizations: NASA, Service, JPL, Caltech, Kepler Space, Harvard
☆ Earth-size exoplanet may be covered in volcanoes
  + stars: | 2023-05-17 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +6 min
Instead, the exoplanet, called LP 791-18 d, is likely covered in volcanoes and may experience eruptions with the same frequency as Jupiter’s moon Io, the most volcanically active place in our solar system, according to researchers. LP 791-18 d is located about 90 light-years from Earth in the Crater constellation, where it orbits a small red dwarf star. And astronomers believe the massive planet LP 971-18 c might be contributing to the newly detected exoplanet’s possible volcanism. As the two objects orbit their star, LP 971-18 c and the newfound exoplanet LP 791-18 d closely pass each other, allowing the gravitational pull of the larger planet LP 971-18 c to tug on planet d and reshape its orbit. The discovery of LP 971-18 d points to the importance of data collected by space telescopes.
☆ Webb Telescope Finds a Star Cloaked in 3 Rings of Ruined Worlds
  + stars: | 2023-05-08 | by ( Robin George Andrews | ) www.nytimes.com   time to read: +1 min
Fomalhaut, a star just 25 light-years away, is so dazzlingly bright that it blots out the faint light of other stars around it. Stargazers have been enraptured by its secrets for thousands of years. Now, with the help of the James Webb Space Telescope, astronomers have documented evidence that Fomalhaut is a dynamic star wreathed in cosmic chaos. The powerful observatory’s infrared vision is letting astronomers better understand Fomalhaut’s features, including a mysterious ring unlike anything found in our solar system. “It’s the first time we’ve seen such structures in an evolved system.”The findings could contribute to the solution to an existential puzzle: How weird, or ordinary, is our solar system?
☆ A communications satellite the size of an apartment is so bright it can outshine stars, and astronomers are worried it could interfere with their research
  + stars: | 2022-12-07 | by ( Paola Rosa-Aquino | ) www.businessinsider.com   time to read: +4 min
AST SpaceMobile deployed a 693-square-foot communications satellite into orbit called BlueWalker 3. Astronomers say it's as bright as some of the brightest stars, and warn it could impact their work. AST SpaceMobile bills it as the "largest-ever commercial communications array deployed in low Earth orbit." Astronomers are also concerned about how satellite constellations contribute to the loss to "humanity's ability to experience the natural night sky," according to the IAU statement. When we look up at night sky, many of the bright lights might not be stars — but satellites.
0 next >>
Total: 4