Correlation explorer
Star types:
How common are planets around nearby stars?
Denominator: Gaia DR3 stars and white dwarfs with good parallaxes (parallax/error > 10), split by their place on the colour–magnitude diagram (main sequence, evolved, or remnant) and classed by BP−RP colour. Numerator: those same objects that host at least one confirmed planet with the property you pick.
Of Gaia DR3
,
what share host
?
What kinds of systems does each star type have?
All known host stars in the archive, grouped by effective temperature. These are shares of known planets, so they mostly show what each survey method can find.
Read with care
- Selection bias. These are known planets, not all planets. Transit surveys favour big planets on short orbits, radial-velocity surveys favour massive ones, and most host stars were never searched thoroughly. A low percentage usually means "not looked for hard enough" rather than "rare".
- Estimated values. The archive's composite table fills in missing radius or mass with a mass–radius relation, so planet types for planets known only by mass (or only by radius) are approximate.
- Spectral classes. On this page, star types come from colour (Gaia BP−RP) in the Gaia section and from effective temperature in the archive sections. Neither is a spectroscopic classification. For white dwarfs the colour class only describes their colour, not a spectral type.
- Evolutionary stage comes from position on the Gaia colour–magnitude diagram. Main sequence: within a band around the dwarf sequence, so some subgiants and unresolved binaries leak in. Evolved (non-main-sequence): brighter than that band (subgiants, giants), plus blue hot subdwarfs. Remnant: the white-dwarf sequence, with a photometric-quality cut. Whole Milky Way means every Gaia DR3 source with a good parallax: about 100 million objects, mostly within a few thousand parsecs. That is roughly 0.1% of the Galaxy's stars, and at large distances it is biased toward bright ones. Colours are not corrected for interstellar dust, which reddens distant stars and pushes them toward cooler classes. Neutron stars and black holes are not in the Gaia counts, but pulsar hosts are labelled remnants in the "Star stage" attribute above. Hosts without good Gaia data are staged from log g instead.
- Planet types by radius: Earth-size < 1.25 R⊕, super-Earth 1.25–2, sub-Neptune 2–4, Neptune-like 4–8, gas giant ≥ 8. Hot Jupiter: radius ≥ 8 R⊕ and period < 10 days. Temperate: radius < 2 R⊕ and 0.35–1.75 × Earth's insolation.