What is an Exoplanet ?

Planets that orbit around other stars outside our solar system are called Exoplanets. They are very hard to see
using telescope due to brightness of their parent stars. However, astronomer could measure gravitational tug
caused to the parent stars due to exoplant orbit to indirectly detect the presence of these mysterious space entity.

Yes, planets also have an influence on their parent stars. For example, Jupiter creates a measurable impact on
Sun's center position. After all if we find aliens, it is going to come from one of these exoplanets. So analysing data on
exoplants at kaggle should be fun.

I credit and appreciate NASA for giving us this data for free. I downloaded this data from Nasa website
https://exoplanetarchive.ipac.caltech.edu/index.html

As of now, there are about 5000 Exo-planets discovered by different scientific groups around the world.
This datasets contains details on each of the exo-planets such as their:

• discovery method and facility
• scientific group that discoved this planet
• Orbital period
• Planet radius and Mass
• Planet Eccentricity
• Parent stars temperature, radius, mass, metallicity ratio, surface gravity etc.

Column details

• COLUMN pl_name: Planet Name
• COLUMN hostname: Host Name
• COLUMN default_flag: Default Parameter Set
• COLUMN sy_snum: Number of Stars
• COLUMN sy_pnum: Number of Planets
• COLUMN discoverymethod: Discovery Method
• COLUMN disc_year: Discovery Year
• COLUMN disc_facility: Discovery Facility
• COLUMN soltype: Solution Type
• COLUMN pl_controv_flag: Controversial Flag
• COLUMN pl_refname: Planetary Parameter Reference
• COLUMN pl_orbper: Orbital Period [days]
• COLUMN pl_orbpererr1: Orbital Period Upper Unc. [days]
• COLUMN pl_orbpererr2: Orbital Period Lower Unc. [days]
• COLUMN pl_orbperlim: Orbital Period Limit Flag
• COLUMN pl_orbsmax: Orbit Semi-Major Axis [au])
• COLUMN pl_orbsmaxerr1: Orbit Semi-Major Axis Upper Unc. [au]
• COLUMN pl_orbsmaxerr2: Orbit Semi-Major Axis Lower Unc. [au]
• COLUMN pl_orbsmaxlim: Orbit Semi-Major Axis Limit Flag
• COLUMN pl_rade: Planet Radius [Earth Radius]
• COLUMN pl_radeerr1: Planet Radius Upper Unc. [Earth Radius]
• COLUMN pl_radeerr2: Planet Radius Lower Unc. [Earth Radius]
• COLUMN pl_radelim: Planet Radius Limit Flag
• COLUMN pl_radj: Planet Radius [Jupiter Radius]
• COLUMN pl_radjerr1: Planet Radius Upper Unc. [Jupiter Radius]
• COLUMN pl_radjerr2: Planet Radius Lower Unc. [Jupiter Radius]
• COLUMN pl_radjlim: Planet Radius Limit Flag
• COLUMN pl_bmasse: Planet Mass or Mass*sin(i) [Earth Mass]
• COLUMN pl_bmasseerr1: Planet Mass or Mass*sin(i) [Earth Mass] Upper Unc.
• COLUMN pl_bmasseerr2: Planet Mass or Mass*sin(i) [Earth Mass] Lower Unc.
• COLUMN pl_bmasselim: Planet Mass or Mass*sin(i) [Earth Mass] Limit Flag
• COLUMN pl_bmassj: Planet Mass or Mass*sin(i) [Jupiter Mass]
• COLUMN pl_bmassjerr1: Planet Mass or Mass*sin(i) [Jupiter Mass] Upper Unc.
• COLUMN pl_bmassjerr2: Planet Mass or Mass*sin(i) [Jupiter Mass] Lower Unc.
• COLUMN pl_bmassjlim: Planet Mass or Mass*sin(i) [Jupiter Mass] Limit Flag
• COLUMN pl_bmassprov: Planet Mass or Mass*sin(i) Provenance
• COLUMN pl_orbeccen: Eccentricity
• COLUMN pl_orbeccenerr1: Eccentricity Upper Unc.
• COLUMN pl_orbeccenerr2: Eccentricity Lower Unc.
• COLUMN pl_orbeccenlim: Eccentricity Limit Flag
• COLUMN pl_insol: Insolation Flux [Earth Flux]
• COLUMN pl_insolerr1: Insolation Flux Upper Unc. [Earth Flux]
• COLUMN pl_insolerr2: Insolation Flux Lower Unc. [Earth Flux]
• COLUMN pl_insollim: Insolation Flux Limit Flag
• COLUMN pl_eqt: Equilibrium Temperature [K]
• COLUMN pl_eqterr1: Equilibrium Temperature Upper Unc. [K]
• COLUMN pl_eqterr2: Equilibrium Temperature Lower Unc. [K]
• COLUMN pl_eqtlim: Equilibrium Temperature Limit Flag
• COLUMN ttv_flag: Data show Transit Timing Variations
• COLUMN st_refname: Stellar Parameter Reference
• COLUMN st_spectype: Spectral Type
• COLUMN st_teff: Stellar Effective Temperature [K]
• COLUMN st_tefferr1: Stellar Effective Temperature Upper Unc. [K]
• COLUMN st_tefferr2: Stellar Effective Temperature Lower Unc. [K]
• COLUMN st_tefflim: Stellar Effective Temperature Limit Flag
• COLUMN st_rad: Stellar Radius [Solar Radius]
• COLUMN st_raderr1: Stellar Radius Upper Unc. [Solar Radius]
• COLUMN st_raderr2: Stellar Radius Lower Unc. [Solar Radius]
• COLUMN st_radlim: Stellar Radius Limit Flag
• COLUMN st_mass: Stellar Mass [Solar mass]
• COLUMN st_masserr1: Stellar Mass Upper Unc. [Solar mass]
• COLUMN st_masserr2: Stellar Mass Lower Unc. [Solar mass]
• COLUMN st_masslim: Stellar Mass Limit Flag
• COLUMN st_met: Stellar Metallicity [dex]
• COLUMN st_meterr1: Stellar Metallicity Upper Unc. [dex]
• COLUMN st_meterr2: Stellar Metallicity Lower Unc. [dex]
• COLUMN st_metlim: Stellar Metallicity Limit Flag
• COLUMN st_metratio: Stellar Metallicity Ratio
• COLUMN st_logg: Stellar Surface Gravity [log10(cm/s**2)]
• COLUMN st_loggerr1: Stellar Surface Gravity Upper Unc. [log10(cm/s**2)]
• COLUMN st_loggerr2: Stellar Surface Gravity Lower Unc. [log10(cm/s**2)]
• COLUMN st_logglim: Stellar Surface Gravity Limit Flag
• COLUMN sy_refname: System Parameter Reference
• COLUMN rastr: RA [sexagesimal]
• COLUMN ra: RA [deg]
• COLUMN decstr: Dec [sexagesimal]
• COLUMN dec: Dec [deg]
• COLUMN sy_dist: Distance [pc]
• COLUMN sy_disterr1: Distance [pc] Upper Unc
• COLUMN sy_disterr2: Distance [pc] Lower Unc
• COLUMN sy_vmag: V (Johnson) Magnitude
• COLUMN sy_vmagerr1: V (Johnson) Magnitude Upper Unc
• COLUMN sy_vmagerr2: V (Johnson) Magnitude Lower Unc
• COLUMN sy_kmag: Ks (2MASS) Magnitude
• COLUMN sy_kmagerr1: Ks (2MASS) Magnitude Upper Unc
• COLUMN sy_kmagerr2: Ks (2MASS) Magnitude Lower Unc
• COLUMN sy_gaiamag: Gaia Magnitude
• COLUMN sy_gaiamagerr1: Gaia Magnitude Upper Unc
• COLUMN sy_gaiamagerr2: Gaia Magnitude Lower Unc
• COLUMN rowupdate: Date of Last Update
• COLUMN pl_pubdate: Planetary Parameter Reference Publication Date
• COLUMN releasedate: Release Date