Epic exoplanet 51 EP

WASP-18 c

RA 24.3545° · Dec -45.6778° · exoplanet

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Score breakdown

· 7 badges

51 pts · Epic

Epic 68 pts → Anomaly

Lava world +14
Hot Jupiter +10
Blasted by starlight +8
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4
Found by TESS +4

Total score 51

17 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Multi-planet system · +6
Blasted by starlight · +8
Found by TESS · +4

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 7.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 628.9 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 4027 years in a starship at a tenth of light speed.
Distance. 403 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1623.

Saying hello

Say hello. A radio message and its reply would take 805 years round-trip.

Standing on it

A year here. A full year lasts just 2.2 Earth days.

By the numbers

Size. About 8.6× the width of Earth.
Volume. About 632 Earths could fit inside it.
Mass. Roughly 55.2× Earth's mass — about 0.2 Jupiters.
Your weight. You'd weigh about 0.7× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1556°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by Transiting Exoplanet Survey Satellite (TESS) using the transit timing variations method.

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 0.48
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit Timing Variations
dist ly: 402.7472
eccentricity: 0.015
eq temp k: 1829.5
insolation: 1865.3061
mass earth: 55.2
name: WASP-18 c
orbital period days: 2.1558
radius earth: 8.58
sys num planets: 2

About WASP-18 c

WASP-18 c is an epic exoplanet. It lies about 402.7 light-years from Earth, has an equilibrium temperature near 1,830 K, spans roughly 8.58 Earth radii and weighs about 55.2 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, WASP-18 c is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why WASP-18 c is an epic exoplanet

WASP-18 c scores 51 points on Spacedle's rarity scale, which places it in the epic tier. Another 17 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Multi-planet system, Blasted by starlight and Found by TESS — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.