#HD 85512

[wigmund]

From NASA Image of the Day; April 13, 2018:

NASA's TESS Mission Hopes to Find Exoplanets Beyond Our Solar System

The worlds orbiting other stars are called “exoplanets,” and they come in a wide variety of sizes, from gas giants larger than Jupiter to small, rocky planets about as big around as Earth or Mars. This artist’s impression shows an exoplanet orbiting the Sun-like star HD 85512 in the southern constellation of Vela (The Sail).

This rocky super-Earth is an illustration of the type of planets future telescopes, like NASA's Transiting Exoplanet Survey Satellite (TESS) and James Webb, hope to find outside our solar system. TESS, slated to launch on April 16, 2018, is the next step in the search for planets outside of our solar system, including those that could support life. The mission will find exoplanets that periodically block part of the light from their host stars, events called transits. TESS will survey 200,000 of the brightest stars near the sun to search for transiting exoplanets.

Image Credit: ESO/M. Kornmesser

[scienceacumen]

This artist’s impression shows the planet orbiting the Sun-like star HD 85512, located about 35 light-years away from Earth in the southern constellation of Vela (The Sail). This planet is about 3.6 times as massive as the Earth and lies at the edge of the habitable zone around the star, where liquid water, and perhaps even life, could potentially exist.

Credit: ESO/M. Kornmesser/Nick Risinger (skysurvey.org)

[muthur9000]

Weyland Timeline 2042-2051 

[wonders-of-the-cosmos]

List of extrasolar candidates for liquid water

The following list contains candidates from the list of confirmed objects that meet the following criteria:

Confirmed object orbiting within a circumstellar habitable zone of Earth mass or greater (because smaller objects may not have the gravitational means to retain water) but not a star

Has been studied for more than a year

Confirmed surface with strong evidence for it being either solid or liquid

Water vapour detected in its atmosphere

Gravitational, radio or differentation models that predict a wet stratum

55 Cancri f

With a mass half that of Saturn, 55 Cancri f is likely to be a gas giant with no solid surface. It orbits in the so-called "habitable zone," which means that liquid water could exist on the surface of a possible moon. ]

Proxima Centauri b

Proxima Centauri b is an exoplanet orbiting in the habitable zone of the red dwarfstar Proxima Centauri, which is the closest star to the Sun and part of a triple star system. It is located about 4.2 light-years from Earth in the constellation of Centaurus, making it the closest known exoplanet to the Solar System.

Gliese 581c

Gliese 581c gained interest from astronomers because it was reported to be the first potentially Earth-like planet in the habitable zone of its star, with a temperature right for liquid water on its surface, and by extension, potentially capable of supporting extremophile forms of Earth-like life.

Gliese 667 Cc

Gliese 667 Cc is an exoplanet orbiting within the habitable zone of the red dwarf star Gliese 667 C, which is a member of the Gliese 667 triple star system, approximately 23.62 light-years away in the constellation of Scorpius.

Gliese 1214 b

Gliese 1214 b is an exoplanet that orbits the star Gliese 1214, and was discovered in December 2009. Its parent star is 48 light-years from the Sun, in the constellation Ophiuchus. As of 2017, GJ 1214 b is the most likely known candidate for being an ocean planet. For that reason, scientists have nicknamed the planet "the waterworld".

HD 85512 b

HD 85512 b is an exoplanet orbiting HD 85512, a K-type main-sequence star approximately 36 light-years from Earth in the constellation of Vela.

Due to its mass of at least 3.6 times the mass of Earth, HD 85512 b is classified as a rocky Earth-size exoplanet (<5M⊕) and is one of the smallest exoplanets discovered to be just outside the inner edge of the habitable zone.

MOA-2007-BLG-192Lb

MOA-2007-BLG-192Lb, occasionally shortened to MOA-192 b, is an extrasolar planet approximately 3,000 light-years away in the constellation of Sagittarius. The planet was discovered orbiting the brown dwarf or low-mass star MOA-2007-BLG-192L. At a mass of approximately 3.3 times Earth, it is one of the lowest-mass extrasolar planets at the time of discovery. It was found when it caused a gravitational microlensing event on May 24, 2007, which was detected as part of the MOA-II microlensing survey at the Mount John University Observatory in New Zealand.

Kepler-22b

Kepler-22b, also known by its Kepler object of interest designation KOI-087.01, is an extrasolar planet orbiting within the habitable zone of the Sun-like star Kepler-22. It is located about 587 light-years (180 pc) from Earth in the constellation of Cygnus. source

[gaetaniu]

Gli astronomi scoprono le misteriose origini delle super-Terre

Gli astronomi scoprono le misteriose origini delle super-Terre

Questa illustrazione artistica mostra il pianeta che orbita intorno alla stella simile al Sole HD 85512 nella costellazione meridionale della Vela. Questo pianeta è una delle sedici super-Terre scoperte dallo strumento HARPS sul telescopio da 3,6 metri dell’Osservatorio La Silla dell’ESO. Questo pianeta è circa 3,6 volte più massiccio della Terra e si trova al limite della zona abitabile intorno…

[componentplanet]

Researchers Use 3D Climate Modeling to Estimate Planet Habitability

This artist’s impression shows the planet orbiting the Sun-like star HD 85512 in the southern constellation of Vela (The Sail). This planet is one of sixteen super-Earths discovered by the HARPS instrument on the 3.6-metre telescope at ESO’s La Silla Observatory. This planet is about 3.6 times as massive as the Earth lis at the edge of the habitable zone around the star, where liquid water, and perhaps even life, could potentially exist.

NASA missions like Kepler and the Transiting Exoplanet Survey Satellite (TESS) have revealed just how many planets there are in the universe. Simply knowing that planets exist doesn’t tell us if there’s anyone living there. When astronomers suggest an exoplanet could be habitable, that’s a very rough estimate. A new study is the first to use 3D climate modeling to help nail down which exoplanets could support life. 

Red dwarf stars (sometimes called M dwarfs) are the most common type in the galaxy — there’s one right next door called Proxima Centauri. You might remember hearing a lot about Proxima Centauri in the last few years because there’s strong evidence for an Earth-like exoplanet there. Indeed, scientists think red dwarf stars host a plethora of exoplanets. While they’re smaller and cooler than our sun, they’re very long-lived and exoplanets could host liquid water if they orbit close enough. 

The new study from Northwestern University researchers combined 3D climate models with photochemistry and atmospheric chemistry, a first for exoplanet research. This research didn’t involve observing exoplanets but rather focused on creating a model that more accurately calculates the effects of solar radiation. The team believes this simulation provides a fuller picture of conditions on the surface of exoplanets, allowing astronomers to prioritize observations on the most likely targets. 

This artist’s impression shows the planet Proxima b orbiting in the Goldilocks zone around the red dwarf star Proxima Centauri, the closest star to the Solar System.

According to the researchers, 3D photochemistry hasn’t been used in exoplanet research because it’s so computationally expensive. Taking the time to do it, however, shows that such techniques can be vital to estimating the heating and cooling effects of solar radiation. Knowing how solar radiation interacts with the gases in a planet’s atmosphere can help differentiate between Earth-like planets and acidic hellscapes like Venus. For example, a planet might be inside the habitable zone of a star, but its thin ozone layer could mean too much ultraviolet radiation on the surface. The simulations also show that planets orbiting active stars are susceptible to losing significant water through vaporization. Without liquid water, life as we know it is impossible. 

This research could help guide future studies of distant planets, particularly when the James Webb Space Telescope comes online in a few years. That instrument will have vastly increased sensitivity compared with Hubble, allowing it to detect water vapor and ozone in planetary atmospheres. Astronomers just need to know which planets are the most likely homes to alien life.

Now read:

New Analysis of Kepler Data Finds Hundreds of New Exoplanets

TESS Finds Potentially Habitable Super-Earth Just 31 Light Years Away

Scientists Simulate Human Colonization of the Milky Way

from ExtremeTechExtremeTech https://www.extremetech.com/extreme/302009-researchers-use-3d-climate-modeling-to-estimate-planet-habitability from Blogger http://componentplanet.blogspot.com/2019/11/researchers-use-3d-climate-modeling-to.html

[lippyawards]

Researchers Use 3D Climate Modeling to Estimate Planet Habitability

Researchers Use 3D Climate Modeling to Estimate Planet Habitability

This artist’s impression shows the planet orbiting the Sun-like star HD 85512 in the southern constellation of Vela (The Sail). This planet is one of sixteen super-Earths discovered by the HARPS instrument on the 3.6-metre telescope at ESO’s La Silla Observatory. This planet is about 3.6 times as massive as the Earth lis at the edge of the habitable zone around the star, where liquid…

[smietanin]

Ученые предсказали климатическую катастрофу в России - РИА Новости

РИА Новости

Ученые предсказали климатическую катастрофу в России РИА Новости МОСКВ��, 28 июн — РИА Новости. В северной части Баренцева моря наблюдаются резкие климатические изменения, сообщают норвежские ученые. Выводы исследователей опубликованы в научном издании Natural Climate Change. Рисунок экзопланеты HD 85512 b в созвездии ... Ученые предрекли климатическую катастрофу в РоссииГазета.Ru Все похожие статьи: 26 »

[spaceplasma]

The Formation and Dynamics of Super-Earth Planets

Super-Earths, objects slightly larger than Earth and slightly smaller than Uranus, have found a special place in exoplanetary science. As a new class of planetary bodies, these objects have challenged models of planet formation at both ends of the spectrum and have triggered a great deal of research on the composition and interior dynamics of rocky planets in connection to their masses and radii.

Being relatively easier to detect than an Earth-sized planet at 1 AU around a G star, super-Earths have become the focus of worldwide observational campaigns to search for habitable planets. With a range of masses that allows these objects to retain moderate atmospheres and perhaps even plate tectonics, super-earths may be habitable if they maintain long-term orbits in the habitable zones of their host stars. Given that in the past two years a few such potentially habitable super-Earths have in fact been discovered, it is necessary to develop a deep understanding of the formation and dynamical evolution of these objects.

This article reviews the current state of research on the formation of super-Earths and discusses different models of their formation and dynamical evolution.

Image Credit: ESO/M. Kornmesser