Hacker News with Generative AI: Exoplanets

New analysis casts doubt on 'biosignatures' found on planet K2-18B (npr.org)
Astronomers have been poring over last week's claim of the detection of life-associated gases in the atmosphere of a distant planet named K2-18b — "the strongest evidence yet that life may exist on a planet outside our solar system," as a University of Cambridge press release put it.

Astronomy, Exoplanets, Science, Life Detection

21 points by ceejayoz 18 hours ago | 6 comments

Signs of alien life on exoplanet K2-18B may just be statistical noise (newscientist.com)
Apparent signs of alien life on the exoplanet K2-18b may just be statistical noise, according to a new analysis of data from the James Webb Space Telescope.

Space Exploration, Exoplanets, Astronomy, Statistical Analysis

11 points by cryptoz 1 day ago | 1 comments

Scientists find 'strongest evidence yet' of life on distant planet (bbc.com)
Scientists have found new but tentative evidence that a faraway world orbiting another star may be home to life.

Exoplanets, Astronomy, Life, Science, Biology

14 points by vinni2 9 days ago | 1 comments

“Most promising signs yet” of alien life on a planet beyond our Solar System (skyatnightmagazine.com)

Astronomy, Exoplanets, Alien Life

417 points by fuidani 9 days ago | 349 comments

Astronomers claim strongest evidence of alien life yet (newscientist.com)
Astronomers claim to have seen the strongest evidence so far for life on another planet. But other astronomers have urged caution until the findings can be verified by other groups and alternative, non-biological explanations can be ruled out.

Astronomy, Exoplanets, Alien Life, Science

12 points by tony69 9 days ago | 3 comments

Strongest evidence of life yet found on planet beyond solar system (news.sky.com)
Scientists have found what they are calling the strongest sign yet of possible life beyond our solar system after detecting the chemical footprint of gases in an alien planet's atmosphere that on Earth are only produced by living organisms.

Space Exploration, Astronomy, Astrobiology, Exoplanets

11 points by austinallegro 9 days ago | 2 comments

Telescope finds promising hints of life on distant planet (bbc.com)
Scientists have found new but tentative evidence that a faraway world orbiting another star may be home to life.

Astronomy, Exoplanets, Life, Science

15 points by anaclet0 9 days ago | 2 comments

Exoplanet K2-18B: Alien ocean world likely 'teeming with life' (thetimes.com)

Exoplanets, Astronomy, Space Exploration, Life

5 points by kapkapkap 9 days ago | 1 comments

Astronomers Detect a Possible Signature of Life on a Distant Planet (nytimes.com)
The search for life beyond Earth has led scientists to explore many suggestive mysteries, from plumes of methane on Mars to clouds of phosphine gas on Venus. But as far as we can tell, Earth’s inhabitants remain alone in the cosmos.

Astronomy, Exoplanets, Science

168 points by julienchastang 9 days ago | 128 comments

A Multiwavelength Look at Proxima Centauri's Flares (centauri-dreams.org)
The problem of flares in red dwarf planetary systems is stark. With their habitable zones relatively near to the star, planets that might support life are exposed to huge outbursts of particles and radiation that can strip their atmospheres. We can see that in nearby M-dwarfs like Proxima Centauri, which is extremely active not only in visible light but also in radio and millimeter wavelengths. New work at the Atacama Large Millimeter/submillimeter Array (ALMA) digs into the millimeter-wavelength activity.

Astronomy, Exoplanets, Habitable Zones

57 points by JPLeRouzic 23 days ago | 13 comments

JWST reveals exoplanet composition with unprecedented clarity (chemistryworld.com)
Exoplanets orbiting a star 133 light years away contain a far greater abundance of carbon than the star itself, according to the first direct spectral data of this kind captured by the James Webb Space Telescope (JWST).

Astronomy, Exoplanets, Spectroscopy

7 points by Brajeshwar 30 days ago | 0 comments

The solar system is teeming with 1M 'alien invaders' from Alpha Centauri (space.com)

Space, Astronomy, Exoplanets, Alien Life

6 points by Brajeshwar 52 days ago | 1 comments

Extreme supersonic winds measured on a planet outside our solar system (phys.org)
Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet.

Space, Exoplanets, Astronomy, Planetary Science

85 points by PaulHoule 71 days ago | 58 comments

IAC confirms existence of a Super-earth in the habitable zone of a Sun-like Star (iac.es)
The Instituto de Astrofísica de Canarias (IAC) and the Universidad de La Laguna (ULL) has confirmed the discovery of a super-Earth orbiting in the habitable zone of HD 20794, a nearby Sun-like star.

Astronomy, Exoplanets, Habitable Zones

421 points by ohjeez 88 days ago | 281 comments

Wasp-127B: Scientists discover giant planet with super fast winds (bbc.co.uk)
Scientists have discovered a huge planet with supersonic high wind speeds.

Space, Astronomy, Exoplanets, Planets, Wind

8 points by ZeljkoS 93 days ago | 5 comments

Recalibrating 'Hot Jupiter' Migration (centauri-dreams.org)
What catches your eye in this description of an exoplanetary system? Start with a ‘hot Jupiter,’ with a radius 0.87 times that of our Jupiter and an orbit of 7.1 days. This is WASP-132b, confirmed in 2016, and first discovered through the labors of the Wide-Angle Search for Planets program.

Exoplanets, Astronomy, Space Exploration, Hot Jupiters

5 points by JPLeRouzic 100 days ago | 0 comments

Life Without Stars: Stanets and Ploons (theeggandtherock.com)
Last year, the James Webb Space Telescope made a startling new discovery about how, and where, planets can form.

Astronomy, Space Exploration, Scientific Discoveries, Exoplanets

3 points by davezatch 112 days ago | 0 comments

Science Talk – What Are Pulsar Planets? (2022) (spaceaustralia.com)
2022 marks the 30-year anniversary since the discovery of the first exoplanets, which happened to be orbiting a pulsar - one of the most unusual places we could find any planet. But what is a pulsar planet, and how did they get there?

Astronomy, Exoplanets, Pulsars

4 points by raattgift 159 days ago | 1 comments

Are nearby planets sending radio signals to each other? (science.psu.edu)
A new technique allows astronomers to home in on planets beyond our solar system that are in line with each other and with Earth to search for radio signals similar, for example, to ones used to communicate with the rovers on Mars.

Astronomy, Space Exploration, Exoplanets, Radio Signals

17 points by geox 186 days ago | 0 comments

Alien worlds might not have a night and day. How would that change evolution? (bbc.com)
Distinct days and nights have helped life flourish on Earth. But many alien worlds capable of supporting life may not have such clear delineations.

Astronomy, Biology, Evolution, Exoplanets

6 points by ranit 195 days ago | 0 comments

Exoplanet found around our closest lone star (cosmosmagazine.com)
An exoplanet has been discovered orbiting the nearest single star to Earth (apart from the Sun), only 6 light-years away.

Exoplanets, Astronomy, Space Exploration

15 points by geox 202 days ago | 0 comments

JWST Has Spotted Six Rogue Planets, Without a Star to Call Home (sciencealert.com)

Space, Astronomy, Planets, Exoplanets

30 points by Brajeshwar 241 days ago | 6 comments

James Webb detects rare 'super-Jupiter' planet (usatoday.com)

Space Exploration, Astronomy, Exoplanets

6 points by gmays 272 days ago | 0 comments

Webb directly images giant exoplanet that isn't where it should be (arstechnica.com)

Space Exploration, Astronomy, Exoplanets, Astrophysics

6 points by LinuxBender 275 days ago | 0 comments

Mini-Neptune turned out to be a frozen super-Earth (arstechnica.com)