Astrophysics (index)about

Extra-Solar Planet

(Exoplanet)
(planet not in the solar system)

An Extra-Solar Planet (or Exoplanet) is a planet outside the Solar System, e.g., orbiting another star. The first confirmed detection of an exoplanet was in 1992 and the first around a Main Sequence Star (51 Pegasi) in 1995.

As of 2/2018, 3500+ planets around 2600+ stars are known.

Detection methods:

A number of methods have been contemplated for future technology:

The RV method reveals the relative density of the host star and planet, and a transit reveals their relative radius, so the density of a planet can be estimated if the planet can be observed by both methods, limited by the accuracy of these estimates for the star. For this reason, follow-ups are carried out to get both if that possibility looks promising, and leads to attempts to predict transit times from RV data, especially if the orbit is long (i.e., transits are infrequent) and available telescope time is limited.

Some terms used to indicate planets of various characteristics, particularly their rough size:

Larger than Super Jupiters are Brown Dwarves. Terms like Super Neptune are also used to indicate a Neptune-like composition.

The spacecraft Kepler is designed to Survey the sky for exoplanets, and as of 1/2016 has detected 1000 planets and 3600 additional candidates.

Projected population statistics based upon surveys:

The commonly used method of referring to exoplanets is somewhat-modeled after the system for individual members of Binary Stars. The first planet discovered is specified by the star's name followed by "b", the next, "c". For example HD 80606 b is a planet orbiting the star HD 80606. If two or more are discovered simultaneously, they are lettered outward from the innermost.


(planets)
http://en.wikipedia.org/wiki/Exoplanet
http://exoplanets.org/

Referenced by:
Abiotic Oxygen
Alpha Centauri
Automated Planet Finder (APF)
ARIEL
Astrometry
Atmospheric Model
Atmospheric Temperature Profile
Black Widow Pulsar (B1957+20)
Bayer Designation
Biofluorescence
Biosignature
Blended Spectra
Bulk Silicate Earth (BSE)
Carbonate-silicate Cycle
CHEOPS
Circumbinary Planet
Circumplanetary Disk
California-Kepler Survey (CKS)
Carbon Dioxide (CO2)
Color-color Diagram
Comet Planet
Coronagraph
CRIRES
Crustal Plates
Carl Sagan Institute (CSI)
Darwin
Dead Zone
Direct Imaging
Double-line Spectroscopic Binary
Double Transit
Earth
Earthshine
Eccentricity (e)
Eclipse Mapping
EPOXI
Extreme Adaptive Optics (ExAO)
ExoCTK
Exoearth
Exosatellite
Exo-S
F-type Star (F)
FINESSE
51 Pegasi b (51 Peg b)
Flamsteed Designation
47 Tucanae (47 Tuc)
Forward Model
Gas Giant
Gas Planet
G-CLEF
General Circulation Model (GCM)
Gemini Observatory
Geochemistry
Geosignature
Giant Planet
Gliese-Jahreiss Catalog (GJ)
GJ 1132 b
GJ 1214 b
Gemini Planet Imager (GPI)
Greenhouse Effect
HabEx
Habitability
HARPS
HARPS-N
HATNet
HCI
Hot Jupiter (HJ)
HR 8799
Humidity
Hydrology
Insolation
Internal Gravity Wave
Intertropical Convergence Zone (ITCZ)
Jupiter
K-Type Star (K)
Keck Observatory
Kelvin Waves
Kepler Telescope
Kepler Radius
Kozai Mechanism
Keck Planet Finder (KPF)
Keck Planet Imager And Characterizer (KPIC)
MACHO Project
Magma Ocean
MASCARA
Mass Extinction
Maximum Iron Fraction
M Dwarf
Mega-Earth
Gravitational Microlensing
MOA
Molecular Handedness
Multiplicity Fraction
MUSCLES
New Worlds Mission
Numerical Weather Prediction (NWP)
Occultation
OGLE
One Dimensional Climate Model
Orbital Inclination
Origins Space Telescope (OST)
PanCET
Perturbation Theory
Phase Curve
Photoevaporation
Photometry
Planet
Planet Type
PLATO
Proxima B
PSF Fitting
Radial Velocity (RV)
Rayleigh Scattering
Red Dwarf
Red Noise
Redshift (z)
Retrieval
Rocky Planet
Rossiter-McLaughlin Effect (RM Effect)
Sloan Digital Sky Survey (SDSS)
Secondary Eclipse
Speckle Suppression
Spectroscopic Binary
SPECULOOS
SPHERE
Star Count
Starshade
Stellar Radius Determination
Subaru Telescope
Subgrid-Scale Physics
Sunspot
Super-Earth
Superrotating Wind
Survey-based Designator
Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS)
Timescale (t)
Terrestrial Planet Finder (TPF)
Transient Astronomy
Transit
Transiting Planet
Transit Spectroscopy
Transmission Spectroscopy
TRAPPIST
TRAPPIST-1
Trans-Atlantic Exoplanet Survey (TrES)
Transit Timing Variations (TTV)
Ultimate Spitzer Phase Curve Survey (USPCS)
Vegetation Red Edge (VRE)
Water-Ice Planet
Water Lines
Water Vapor Planet
James Webb Space Telescope (JWST)
WFIRST
XO Project

index