tau Ceti

Four Earth-sized Planets Detected Orbiting tau Ceti

Four Earth-sized Planets Detected Orbiting tau Ceti

A new study by an international team of astronomers reveals that four Earth-sized planets orbit the nearest sun-like star, tau Ceti, which is about 12 light years away and visible to the naked eye.

TRAPPIST-1

TRAPPIST-1 is Older Than Our Solar System

TRAPPIST-1 is Older Than Our Solar System

If we want to know more about whether life could survive on a planet outside our solar system, it's important to know the age of its star.

Extrasolar Planets

Two Possible Planets In Tau Ceti's Habitable Zone

Two Possible Planets In Tau Ceti's Habitable Zone

The removal of noise typically correlated in time and wavelength is one of the main challenges for using the radial velocity method to detect Earth analogues.

Astrochemistry

Gas - Grain Surface Chemistry In Molecular Clouds

Gas - Grain Surface Chemistry In Molecular Clouds

Advanced telescopes, such as ALMA and JWST, are likely to show that the chemical universe may be even more complex than currently observed, requiring astrochemical modelers to improve their models to account for the impact of new data.

Astrochemistry

Primordial Black Holes May Have Helped To Forge Heavy Elements

Primordial Black Holes May Have Helped To Forge Heavy Elements

Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis. As the late Carl Sagan once put it: "The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of star stuff."

Extrasolar Planets

Transiting Exoplanet Survey Satellite Passes Critical Review

Transiting Exoplanet Survey Satellite Passes Critical Review Video in Story

NASA's Transiting Exoplanet Survey Satellite (TESS) has moved one step closer to launch after successfully passing its Systems Integration Review (SIR), an independent review from independent technical and scientific experts who have deemed the mission ready to begin installation of its scientific instrument onto the spacecraft.

Extrasolar Planets

EPIC 228813918 b: An Earth-sized Planet in a 4.3-hour Orbit Around An M-dwarf

EPIC 228813918 b: An Earth-sized Planet in a 4.3-hour Orbit Around An M-dwarf

We report the discovery from K2 of a transiting terrestrial planet in an ultra-short-period orbit around an M3-dwarf.

Extrasolar Planets

Characterization Of The K2-18 Multi-planetary System With HARPS

Characterization Of The K2-18 Multi-planetary System With HARPS

The bright M dwarf K2-18 at 34 pc is known to host a transiting super-Earth-sized planet orbiting within the star's habitable zone; K2-18b.

Habitable Zones & Global Climate

Migrating Jupiter Up To The Habitable Zone: Earth-like Planet Formation and Water Delivery

Migrating Jupiter Up To The Habitable Zone: Earth-like Planet Formation and Water Delivery

Several observational works have shown the existence of Jupiter-mass planets covering a wide range of semi-major axes around Sun-like stars.

Astrochemistry

The Interstellar Chemistry of C3H and C3H2 Isomers

The Interstellar Chemistry of C3H and C3H2 Isomers

We report the detection of linear and cyclic isomers of C3H and C3H2 towards various starless cores and review the corresponding chemical pathways involving neutral (C3Hx with x=1,2) and ionic (C3Hx+ with x = 1,2,3) isomers.

Astrochemistry

A 4641Da Polymer of Amino Acids in Acfer 086 And Allende Meteorites

A 4641Da Polymer of Amino Acids in Acfer 086 And Allende Meteorites

A specific 4641Da amino acid polymer entity is present in two CV3 meteorites Acfer 086 and Allende, together with its breakdown polymer fragments of mass < 2000Da.

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