Earth Similarity Index

The Earth Similarity Index (ESI) is a proposed characterization of how similar a planetary-mass object or natural satellite is to Earth. ^[1]

55 relations: Albedo, ArXiv, Asteroid, Astrobiology (journal), BBC, Bray–Curtis dissimilarity, Circumstellar habitable zone, Density, Doppler spectroscopy, Dwarf planet, Earth, Earth analog, Escape velocity, Exoplanet, Exoplanetology, Flare star, Free parameter, Gliese 581c, Gliese 581d, Gliese 581e, Gliese 581g, Gliese 832 c, Greenhouse effect, HD 69830 d, Io (moon), Irradiance, Kepler-438b, Kepler-62e, LHS 1723, List of potentially habitable exoplanets, Luyten b, Magnetosphere, Manuscript (publishing), Mars, Mercury (planet), Methods of detecting exoplanets, Moon, Natural satellite, Orbital period, Planet, Planetary equilibrium temperature, Planetary habitability, Planetary mass, Radial velocity, Radius, Revista Cubana de Física, Ross 128 b, Solar irradiance, Superhabitable planet, The Guardian, ..., Tidal heating, Tidal locking, Titan (moon), University of Puerto Rico at Arecibo, 55 Cancri c. Expand index (5 more) » « Shrink index

Albedo

Albedo (albedo, meaning "whiteness") is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth).

arXiv (pronounced "archive") is a repository of electronic preprints (known as e-prints) approved for publication after moderation, that consists of scientific papers in the fields of mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance, which can be accessed online.

Asteroid

Asteroids are minor planets, especially those of the inner Solar System.

Astrobiology (journal)

Astrobiology is a peer-reviewed scientific journal covering research on the origin, evolution, distribution and future of life across the universe.

BBC

The British Broadcasting Corporation (BBC) is a British public service broadcaster.

Bray–Curtis dissimilarity

In ecology and biology, the Bray–Curtis dissimilarity, named after J. Roger Bray and John T. Curtis, is a statistic used to quantify the compositional dissimilarity between two different sites, based on counts at each site.

Circumstellar habitable zone

In astronomy and astrobiology, the circumstellar habitable zone (CHZ), or simply the habitable zone, is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.

Density

The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.

Doppler spectroscopy

Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star.

Dwarf planet

A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

Earth analog

An Earth analog (also referred to as an Earth twin or Earth-like planet, though this latter term may refer to any terrestrial planet) is a planet or moon with environmental conditions similar to those found on Earth.

Escape velocity

In physics, escape velocity is the minimum speed needed for an object to escape from the gravitational influence of a massive body.

Exoplanet

An exoplanet or extrasolar planet is a planet outside our solar system.

Exoplanetology

Exoplanetology, or exoplanetary science, is an integrated field of astronomical science dedicated to the search and study of exoplanets (extrasolar planets).

Flare star

A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes.

Free parameter

A free parameter is a variable in a mathematical model which cannot be predicted precisely or constrained by the model and must be estimated experimentally or theoretically.

Gliese 581c

Gliese 581c or Gl 581c is a planet orbiting within the Gliese 581 system.

Gliese 581d

Gliese 581d (often shortened to Gl 581d or GJ 581d) is a possible extrasolar planet orbiting within the Gliese 581 system, approximately 20.4 light-years away in the Libra constellation.

Gliese 581e

Gliese 581e or Gl 581e is an extrasolar planet orbiting within the Gliese 581 system, located approximately 20.4 light-years away from Earth in the Libra constellation.

Gliese 581g

Gliese 581g, unofficially known as Zarmina (or Zarmina's World), is an unconfirmed (and frequently disputed) exoplanet claimed to orbit within the Gliese 581 system, twenty light-years from Earth.

Gliese 832 c

Gliese 832 c (also known as Gl 832 c or GJ 832 c) is an extrasolar planet located approximately 16 light-years (4.93 parsecs, or about 151,400,000,000,000 km) away in the constellation of Grus, orbiting the star Gliese 832, a red dwarf.

Greenhouse effect

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.

HD 69830 d

HD 69830 d is an exoplanet likely orbiting within the habitable zone of the star HD 69830, the outermost of three such planets discovered in the system.

Io (moon)

Io (Jupiter I) is the innermost of the four Galilean moons of the planet Jupiter.

Irradiance

In radiometry, irradiance is the radiant flux (power) received by a surface per unit area.

Kepler-438b

Kepler-438b (also known by its Kepler Object of Interest designation KOI-3284.01) is a confirmed near-Earth-sized exoplanet, likely rocky, orbiting on the inner edge of the habitable zone of the red dwarf as it receives 1.4 times our solar flux.

Kepler-62e

Kepler-62e (also known by its Kepler Object of Interest designation KOI-701.03) is a super-Earth exoplanet (extrasolar planet) discovered orbiting within the habitable zone of Kepler-62, the second outermost of five such planets discovered by NASA's Kepler spacecraft.

LHS 1723

LHS 1723 (GJ 3323) is a nearby red dwarf star (0.164 solar masses) of spectral type M4.0, located in constellation Eridanus at 17.4 light-years from Earth.

List of potentially habitable exoplanets

This is a list of potentially habitable exoplanets and possible exoplanets.

Luyten b

Luyten b (more commonly known as GJ 273b) is a confirmed exoplanet, likely rocky, orbiting within the habitable zone of the nearby red dwarf Luyten's Star.

Magnetosphere

A magnetosphere is the region of space surrounding an astronomical object in which charged particles are manipulated or affected by that object's magnetic field.

Manuscript (publishing)

"Manuscript" is a broad concept in publishing, that can refer to one or both of the following.

Mars

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

Mercury (planet)

Mercury is the smallest and innermost planet in the Solar System.

Methods of detecting exoplanets

Any planet is an extremely faint light source compared to its parent star.

Moon

The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

Natural satellite

A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet (or sometimes another small Solar System body).

Orbital period

The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.

Planet

A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.

Planetary equilibrium temperature

The planetary equilibrium temperature is a theoretical temperature that a planet would be at when considered simply as if it were a black body being heated only by its parent star.

Planetary habitability

Planetary habitability is the measure of a planet's or a natural satellite's potential to have habitable environments hospitable to life, or its ability to generate life endogenously.

Planetary mass

Planetary mass is a measure of the mass of a planet-like object.

Radial velocity

The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.

Radius

In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.

Revista Cubana de Física

The Revista Cubana de Física (Cuban Journal of Physics) is a biannual peer-reviewed open access scientific journal published by the Sociedad Cubana de Física (Cuban Physical Society) and the Physics Faculty (University of Havana) that was established in 1981.

Ross 128 b

Ross 128 b is a confirmed Earth-sized exoplanet, likely rocky, orbiting within the inner habitable zone of the red dwarf Ross 128, at a distance of about 11 light-years from Earth;.

Solar irradiance

Solar irradiance is the power per unit area received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument.

Superhabitable planet

A superhabitable planet is a hypothetical type of exoplanet or exomoon that may be better suited than Earth for the emergence and evolution of life.

The Guardian

The Guardian is a British daily newspaper.

Tidal heating

Tidal heating (also known as tidal working or tidal flexing) occurs through the tidal friction processes: orbital energy is dissipated as heat in either the surface ocean or interior of a planet or satellite.

Tidal locking

Tidal locking (also called gravitational locking or captured rotation) occurs when the long-term interaction between a pair of co-orbiting astronomical bodies drives the rotation rate of at least one of them into the state where there is no more net transfer of angular momentum between this body (e.g. a planet) and its orbit around the second body (e.g. a star); this condition of "no net transfer" must be satisfied over the course of one orbit around the second body.

Titan (moon)

Titan is the largest moon of Saturn.

University of Puerto Rico at Arecibo

The University of Puerto Rico at Arecibo (UPRA or UPR-Arecibo) is a state university located in the city of Arecibo, Puerto Rico, and part of the eleven campuses that compose the University of Puerto Rico system.

55 Cancri c

55 Cancri c (abbreviated 55 Cnc c), also named Brahe, is an extrasolar planet in an eccentric orbit around the Sun-like star 55 Cancri A, making one revolution every 44.34 days.

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References

[1] https://en.wikipedia.org/wiki/Earth_Similarity_Index

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Earth Similarity Index

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