Why is there no life on Mars? Rover finds a clue
Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?
Planetary Sciences
Jul 5, 2025
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Page 7: Research news on Habitable zone
The habitable zone as a research area focuses on defining and characterizing the circumstellar regions where planetary surface conditions could permit stable liquid water, given realistic atmospheric and geophysical constraints. This field integrates stellar astrophysics, planetary climate modeling, atmospheric radiative–convective equilibrium, and orbital dynamics to compute inner and outer habitable zone boundaries as functions of stellar type, luminosity evolution, and planetary properties. Researchers investigate feedbacks such as the carbonate–silicate cycle, cloud processes, greenhouse limits, and water loss, and extend the concept to temporal (continuously habitable) zones and system-level habitability, including multiplanet interactions and stellar activity effects on long-term planetary climate stability.
Exoplanet hunters may be misrepresenting the likelihood of their findings
There's nothing to get a scientist's heart pumping like a good, old-fashioned statistical debate. When it comes to topics like finding Earth analogs or hints of a biosignature in an atmosphere, those statistical debates could ...
Planetary Sciences
Jun 30, 2025
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Tiny stars, many Earths: Potentially habitable worlds may be especially common around low-mass stars
According to the latest studies led by Heidelberg University astronomers, low-mass stars quite often host Earth-like planets. Data collected as part of the CARMENES project were the basis of this finding. By analyzing the ...
Astronomy
Jun 27, 2025
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A statistical analysis of exoplanet habitability turns up one great candidate
The search for life beyond our planet continues, and one of the most underappreciated tools in an astrobiologist's toolkit is statistics. While it might not be as glamorous as directly imaging a planet's atmosphere or finding ...
Planetary Sciences
Jun 26, 2025
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Do ocean worlds have smaller habitable zones?
Hycean worlds are also called ocean worlds. They're planets covered in oceans that also have thick hydrogen atmospheres. There are no confirmed hycean worlds but many candidates. Even though they're only candidates so far, ...
Planetary Sciences
Jun 19, 2025
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150
Exoplanetary systems are diverse. Experts argue search for life should be the same
Scientists are revolutionizing the search for extraterrestrial life by challenging our somewhat Earth-centric assumptions about where and how life might exist in the universe. A new review argues that we must embrace the ...
Astrobiology
Jun 18, 2025
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Future telescopes could detect life managing their planet atmospheres
The challenge in the search for habitable worlds is clear. We need to be able to identify habitable worlds and distinguish between biotic and abiotic processes. Ideally, scientists would do this on entire populations of exoplanets ...
Astrobiology
Jun 3, 2025
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Super-Earth discovered in habitable zone of sun-like star via TTV technique, paving way for 'Earth 2.0' searches
"Are we alone?" This ancient question has occupied humanity's mind for a long time. In 1995, the discovery of the first exoplanet orbiting a sun-like star opened the door to exploring this profound mystery.
Astrobiology
Jun 3, 2025
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We need to be looking for life in 'continuous' habitable zones, say researchers
Exoplanet science is shifting from finding any detectable exoplanets we can to searching for those in their stars' habitable zones. NASA's proposed Habitable World Observatory and other similar efforts are focused on these ...
Astrobiology
Jun 2, 2025
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The habitability of Earth tells us the likelihood of finding life elsewhere
The hunt for habitable worlds has become a hot topic in astronomy. For decades, the search has been focused on planets in the "Goldilocks zone"; that narrow band around a star where water stays liquid, not too hot to boil ...
Astrobiology
May 30, 2025
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