Friday, November 18, 2022

Land Fraction Diversity On Earth-like Planets And Implications For Their Habitability - Astrobiology

A balanced ratio of ocean to land is believed to be essential for an Earth-like biosphere and one may conjecture that plate-tectonics planets should be similar in geological properties.

After all, the volume of continental crust evolves towards an equilibrium between production and erosion.

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Publisher: Astrobiology
Date: 2022-11-18T02:56:45 00:00
Author: Keith Cowing
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EarthSky | Keck Planet Finder begins search for other Earths

Astronomers have discovered several thousand exoplanets so far. They are worlds orbiting distant suns, and they range in size from some larger than Jupiter to small rocky planets like Earth. The rocky planets are most likely to be habitable. But small rocky planets are difficult to detect.

These scientists said the Keck Planet Finder is the world's most advanced high-resolution spectrometer for visible wavelengths. Its purpose is to search for smaller planets like Earth orbiting other stars, in particular ones in the habitable zone .

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Publisher: EarthSky | Updates on your cosmos and world
Date: 2022-11-17T12:35:37 00:00
Twitter: @earthskyscience
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Helium-enhanced planets along the upper edge of the radius valley | Nature Astronomy

The Kepler survey revealed that the radius distribution of sub-Neptunes is bimodal: there is a scarcity of planets between 1.5 and 2.0 R ⊕ . However, the mechanism that creates the valley is unknown.

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Publisher: Nature
Date: 2022-11-17
Author: 2022 The Author s under exclusive licence to Springer Nature Limited
Twitter: @NatureAstronomy
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Moon and planets viewing event with the physics department – The Stute

With Stevens being so close to New York City, skywatching is not often a popular (or possible) outdoor activity. Nighttime light pollution, lack of open space, and a general lack of opportunity to take some time and look up at the stars make sure of that.

Stevens students did exactly that on November 9 at Pier C Park. With daylight savings, the sky in the evenings is now dark enough to see Jupiter and Saturn at the same time. This month also had a full moon very early, enabling skywatchers to view that as well.

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PlanetWatch (PLANETS) Rises 21.57% Friday: What's Next for This Very Bullish Rated Crypto?
Twitter: @IOInvestors
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Masaru Imada Trio + 1: Planets (BBE) - JazzTimes

Inaba's walking bass waxes weirder and then more like a hop-skip.

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Publisher: JazzTimes
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Another first for super-powerful James Webb Space Telescope | Inquirer and Mirror

(Nov. 17, 2022) NASA’s new James Webb Space Telescope recently confirmed the first ever detection of carbon dioxide in the atmosphere of an exoplanet.

This detection marks a first major step in the telescope’s mission of detecting and characterizing the atmospheres of planets around other stars.

Publisher: Inquirer and Mirror
Date: Thu 17 Nov 2022 13:07:15 -0500
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EarthSky | Fiery hourglass star seen by Webb

EarthSky editors posted this story, making some minor edits, using a statement from the European Space Agency.

Astronomers said this week (November 16, 2022) that they’ve used the Webb space telescope to catch a newly forming star, designated L1527, whose star-forming cloud makes the shape of an hourglass.

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Publisher: EarthSky | Updates on your cosmos and world
Date: 2022-11-18T12:19:14 00:00
Twitter: @earthskyscience
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New spacecraft and missions to watch in 2023 | The Economist

During the summer of 2023 America's space agency, NASA , plans to launch its Psyche spacecraft to explore an iron-rich asteroid of the same name, 16 Psyche, which is thought to be a remnant of a protoplanet from the earliest days of the solar system.

Continuing the asteroid theme, NASA 's OSIRIS-REX probe is already on its way back to Earth after its rendezvous to take samples of the asteroid Bennu in 2020.

Publisher: The Economist
Twitter: @TheEconomist
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