NASA Exoplanet Archive Archives - Page 3 of 3 - Astrobiology

Planetary distances (circular approximation) from the HZs in relation to the planetary eccentricities. The eccentricity is either the assumed value, an upper limit, or the actual eccentricity. The left panel conveys the full data set, whereas the right panel conveys a zoomed-in portion. Error bars for the non-zero eccentricities are given as well. HD 26161 is not included due to its outlying distance of 17.82 au. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report

Statistics And Habitability of F-type Star–Planet Systems

by Keith CowingJuly 24, 2024July 24, 2024

F-type star–planet systems represent an intriguing case for habitability studies. Although F-type stars spend considerably less time on the main-sequence than G, K, and M-type stars, they still offer a […]

The Zorro contrast curve for TIC-125925505. The blue and red lines show the contrast curves for the 562 nm and 832 nm filters, respectively. The inset shows the reconstructed image of the star from Zorro. -- astro-ph.EP

Astronomy & Telescopes, Citizen Science / Open Science, Education and Outreach, Exoplanets, -moons, -comets, Status Report

Planet Hunters NGTS: New Planet Candidates from a Citizen Science Search of the Next Generation Transit Survey Public Data

by Keith CowingApril 29, 2024April 29, 2024

We present the results from the first two years of the Planet Hunters NGTS citizen science project, which searches for transiting planet candidates in data from the Next Generation Transit […]

Contrast curves around TOI-1347 from Gemini/‘Alopeke; the inset shows the reconstructed image at 832 nm. No companions are detected. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Imaging & Spectroscopy, Status Report

The TESS-Keck Survey. XII. A Dense 1.8 R⊕ Ultra-Short-Period Planet Possibly Clinging to a High-Mean-Molecular-Weight Atmosphere After the First Gyr

by Keith CowingFebruary 13, 2024February 13, 2024

The extreme environments of ultra-short-period planets (USPs) make excellent laboratories to study how exoplanets obtain, lose, retain, and/or regain gaseous atmospheres.

This artist’s concept shows what the sub-Neptune exoplanet TOI-421 b might look like. In a new study, scientists have found new evidence suggesting how these types of planets can lose their atmospheres. Credit: NASA, ESA, CSA, and D. Player (STScI)

Astrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gas Giants, Press Release

Data Reveals Possible Reason Some Exoplanets Are Shrinking

by Keith CowingNovember 16, 2023November 16, 2023

Some exoplanets seem to be losing their atmospheres and shrinking. In a new study using NASA’s retired Kepler Space Telescope, astronomers find evidence of a possible cause: The cores of […]

Illustrating the Doppler effect CREDIT Zayna Sheikh

Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Press Release, SETI & Technosignatures

New Exoplanet-informed Research Sets Clearer Bounds On The Search For Radio Technosignatures

by Keith CowingOctober 24, 2023October 24, 2023

In a new study published in the Astronomical Journal, researchers used the known population of exoplanets and extrapolated to the much larger, unknown population of exoplanets to set better thresholds […]

Teff vs. Seff plot for Red Giant planets (red dots) with optimistic habitable planets denoted in green. Boundaries for Teq, conservative and optimistic HZ are shown in solid, dotted and dashed lines, respectively. -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Status Report

Exoplanets Around Red Giants: Distribution And Habitability

by Keith CowingJuly 13, 2023July 13, 2023

As the search for exoplanets continues, more are being discovered orbiting Red Giant stars. We use current data from the NASA Exoplanet Archive to investigate planet distribution around Red Giant […]