Our inner solar system superimposed behind the orbits of the planets HD 179949 b, HD 164427 b, Epsilon Reticuli ab, and Mu Arae b (each planet has its parent star labeled next to it -- all parent stars are in the center)

Epsilon Reticuli (ε Ret / ε Reticuli) is a 4th magnitude star in the constellation Reticulum. The system is a binary, the primary component being an orange subgiant, and the secondary is probably a red dwarf. The primary star should be easily visible without optical aid under dark skies in southern hemisphere. Image File history File links Download high-resolution version (678x645, 127 KB) Source: http://origins. ... Image File history File links Download high-resolution version (678x645, 127 KB) Source: http://origins. ... HD 179949 is a 6th magnitude star in the constellation of Sagittarius. ... Mu Arae (NASA Nstars database) Mu Arae (μ Ara / μ Arae) is a 5th magnitude yellow-orange G-type star similar to our Sun. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... STAR is an acronym for: Organizations Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... This article or section does not adequately cite its references or sources. ... Reticulum (Latin for reticle), is one of the minor southern (declination -60 degrees) constellations. ... Artists impression of a binary system consisting of a black hole, with an accretion disc around it, and a main sequence star. ... Subgiant are Olly Maw, Dan Hayes and Tushar Joshi, a live dance music band from the UK formed in 2000. ... An artists impression of a planet in orbit around a red dwarf According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type. ...

The primary star is known to have an extrasolar planet orbiting it. An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ...

ε Reticuli A

The primary star, ε Reticuli A, is a yellow subgiant 20% more massive than our Sun. Being a subgiant it is ceasing or has already ceased fusing hydrogen in its core. Soon the star will swell up and become a red giant. Despite its advanced stage, it cannot be much older than the Sun. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... 2000 (MM) was a leap year starting on Saturday of the Gregorian calendar. ... This article or section does not adequately cite its references or sources. ... Reticulum (Latin for reticle), is one of the minor southern (declination -60 degrees) constellations. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... This article is in need of attention from an expert on the subject. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one Julian year. ... Stellar parallax motion The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Sun is the star at the center of the Solar System. ... The deuterium-tritium (D-T) fusion reaction is considered the most promising for producing fusion power. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... Cross section of a red giant showing nucleosynthesis and elements formed According to the Hertzsprung-Russell diagram, a red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler giant stars. ...

ε Reticuli Ab

The planet, designated as ε Reticuli Ab, was discovered in 2001 by the Anglo-Australian Planet Search Team using the highly successful radial velocity method. The planet's mass is at least 28% greater than Jupiter's, a more accurate estimate requiring its inclination to be known. An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ... The following are lists of stars with confirmed extrasolar planets. ... The elements of an orbit are the parameters needed to specify that orbit uniquely, given a model of two ideal masses obeying the Newtonian laws of motion and the inverse-square law of gravitational attraction. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... The astronomical unit (AU or au or a. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... Look up day in Wiktionary, the free dictionary. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... In astrodynamics, the longitude of the periapsis (symbolized ) of an orbiting body is the longitude (measured from the point of the vernal equinox) of periapsis (closest approach to the central body). ... A diagram of Keplerian orbital elements. ... A diagram of Keplerian orbital elements. ... The Julian day or Julian day number (JDN) is the (integer) number of days that have elapsed since Monday, January 1, 4713 BC in the proleptic Julian calendar [1]. That day is counted as Julian day zero. ... Unsolved problems in physics: What causes anything to have mass? The U.S. National Prototype Kilogram, which currently serves as the primary standard for measuring mass in the U.S. Mass is the property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... Adjectives: Jovian Atmosphere Surface pressure: 20–200 kPa[4] (cloud layer) Composition: ~86% H2 ~13% Helium 0. ... Circle illustration In classical geometry, a radius (plural: radii) of a circle or sphere is any line segment from its center to its boundary. ... Adjectives: Jovian Atmosphere Surface pressure: 20–200 kPa[4] (cloud layer) Composition: ~86% H2 ~13% Helium 0. ... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... The U.S. National Prototype Kilogram, which currently serves as the primary standard for measuring mass in the U.S. It was assigned to the United States in 1889 and is periodically recertified and traceable to the primary international standard, The Kilogram, held at the Bureau International des Poids et... The cubic meter (symbol m³) is the SI derived unit of volume. ... Fig. ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ... Paul Butler is an astronomer who searches for extrasolar planets. ... Image:Geoff marcy. ... Any planet is an extremely faint light source compared to its parent star. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... 2001 (MMI) was a common year starting on Monday of the Gregorian calendar. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ...

The planet orbits the star in a very Earth-like orbit. However, the planet is certainly a gas giant and life as we know it may not flourish there. The planet might have massive moons (they cannot be detected with current technology) that could have supported life, but as the star aged they became too hot for life. Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ... The solar systems four gas giants against the Suns limb, to scale A gas giant (sometimes also known as a Jovian planet after the planet Jupiter) is a large planet that is not primarily composed of rock or other solid matter. ... A natural satellite is an object that orbits a planet or other body larger than itself and which is not man-made. ...

Epsilon Reticuli (star), ε Reticuli Ab (gas giant) and its satellites. Some of them may have earth size, and so enable to host life.

Image File history File links This is a lossless scalable vector image. ... Image File history File links This is a lossless scalable vector image. ...

ε Reticuli B

The companion star, ε Reticuli B is likely a dim red dwarf. Not much information is available on it. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... 2000 (MM) was a leap year starting on Saturday of the Gregorian calendar. ... This article or section does not adequately cite its references or sources. ... Reticulum (Latin for reticle), is one of the minor southern (declination -60 degrees) constellations. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... This article is in need of attention from an expert on the subject. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one Julian year. ... Stellar parallax motion The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... In astronomy, many stars are referred to simply by catalogue numbers. ... An artists impression of a planet in orbit around a red dwarf According to the Hertzsprung-Russell diagram, a red dwarf star is a small and relatively cool star, of the main sequence, either late K or M spectral type. ...

References

• Butler et al. (2001). "Two New Planets from the Anglo-Australian Planet Search". The Astrophysical Journal 555: 410-417. 
• Butler, R. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646: 505 – 522.  (web Preprint)

The Astrophysical Journal is one of the foremost research journals devoted to recent developments, discoveries, and theories in astronomy and astrophysics. ... The Astrophysical Journal is a scientific journal covering astronomy and astrophysics. ...

External links

• SIMBAD component A entry, component B entry, planet entry
• The Extrasolar Planets Encyclopaedia entry
• ε Reticuli at Extrasolar Visions
• ε Reticuli Ab at Extrasolar Visions