Astronomy

Space Technology for Directly Imaging and Characterizing Exo-Earths

Space Technology for Directly Imaging and Characterizing Exo-Earths

The detection of Earth-like exoplanets in the habitable zone of their stars, and their spectroscopic characterization in a search for biosignatures, requires starlight suppression that exceeds the current best ground-based performance by orders of magnitude.

Astrobiology (general)

The Epistemological Status of Astrobiology: A Problematic Case of Integration of Scientific Disciplines

The Epistemological Status of Astrobiology: A Problematic Case of Integration of Scientific Disciplines

Astrobiology is a scientific discipline that studies life in the Universe. We call it a discipline and not a science because some authors have cast doubts over its epistemological status by calling it 'a science without an object of study'.

Mars

More Evidence of Water on Early Mars

More Evidence of Water on Early Mars

River deposits exist across the surface of Mars and record a surface environment from over 3.5 billion years ago that was able to support liquid water at the surface.

Astrochemistry

Could Interstellar Ice Provide The Answer To Birth Of DNA?

Could Interstellar Ice Provide The Answer To Birth Of DNA?

Researchers at the University of York have shown that molecules brought to earth in meteorite strikes could potentially be converted into the building blocks of DNA.

Fossils

Half-a-billion-year-old Fossils Shed light Animal Evolution on Earth

Half-a-billion-year-old Fossils Shed light Animal Evolution on Earth

Scientists have discovered traces of life more than half-a-billion years old that could change the way we think about how all animals evolved on earth.

Proxima Centauri b

Was Proxima Centauri Captured by Alpha Centauri A and B?

Was Proxima Centauri Captured by Alpha Centauri A and B?

The nearest stellar system consists of the stars Proxima, alpha Centauri A and B and at least one planet Proxima b. The habitability of Proxima b and any other planets are likely to be significantly influenced by the orbital evolution of the system.

Extrasolar Planets

Photosynthesis Under Light Conditions Different from Earth's

Photosynthesis Under Light Conditions Different from Earth's

M-dwarfs or red dwarfs are small (0.5-0.1 solar-mass) and cool ( ~3,000 kelvin) stars and are abundant in the universe.

Astronomy

Space Telescope Designed to Directly Image the Habitable Zone of Alpha Centauri

Space Telescope Designed to Directly Image the Habitable Zone of Alpha Centauri

The scientific interest in directly image and identifying Earth-like planets within the Habitable Zone (HZ) around nearby stars is driving the design of specialized direct imaging mission such as ACESAT, EXO-C, EXO-S and AFTA-C.

SETI

The Breakthrough Listen Search for Intelligent Life: 1.1-1.9 GHz observations of 692 Nearby Stars

The Breakthrough Listen Search for Intelligent Life: 1.1-1.9 GHz observations of 692 Nearby Stars

We report on a search for engineered signals from a sample of 692 nearby stars using the Robert C. Byrd Green Bank Telescope (GBT), undertaken as part of the Breakthrough Listen Initiative search for extraterrestrial intelligence.

Proxima Centauri b

Do-It-Yourself Science -- Is Proxima c Hiding In This Graph?

Do-It-Yourself Science -- Is Proxima c Hiding In This Graph?

Is Proxima c hiding in this graph?

Polar Research

Secret Life May Thrive In Warm Caves Under Antarctica's Glaciers

Secret Life May Thrive In Warm Caves Under Antarctica's Glaciers

A new study led by ANU has found that animals and plants may live in warm caves under Antarctica's glaciers.

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