Epic exoplanet 57 EP

TOI-1789 b

RA 142.7434° · Dec 26.5400° · exoplanet

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Score breakdown

· 7 badges

57 pts · Epic

Epic 68 pts → Anomaly

Lava world +14
Puffy low-density world +12
Hot Jupiter +10
Blasted by starlight +8
Confirmed exoplanet +5
Gas giant +4
Found by TESS +4

Total score 57

11 more points to reach Anomaly.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Lava world · +14
Puffy low-density world · +12
Blasted by starlight · +8
Found by TESS · +4

Trivia

What makes it special

Lava world. Its surface is likely an ocean of molten rock.
Cotton-candy planet. So low-density it would float on water.

Could we get there?

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

Getting there

Aboard Voyager 1. ≈ 13.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.2 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 7471 years in a starship at a tenth of light speed.
Distance. 747 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1279.

Saying hello

Say hello. A radio message and its reply would take 1494 years round-trip.

Standing on it

A year here. A full year lasts just 3.2 Earth days.

By the numbers

Size. About 16.1× the width of Earth.
Volume. About 4205 Earths could fit inside it.
Mass. Roughly 222× Earth's mass — about 0.7 Jupiters.
Your weight. You'd weigh about 0.9× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 1654°C — hotter than a self-cleaning oven.

How we found it

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

Properties

density gcc: 0.28
discovery facility: Transiting Exoplanet Survey Satellite (TESS)
discovery method: Transit
dist ly: 747.1158
eq temp k: 1927
insolation: 2300
mass earth: 222.4799
name: TOI-1789 b
orbital period days: 3.2087
radius earth: 16.1409
sys num planets: 1

About TOI-1789 b

TOI-1789 b is an epic exoplanet. It lies about 747.1 light-years from Earth, has an equilibrium temperature near 1,927 K, spans roughly 16.14 Earth radii and weighs about 222.48 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, TOI-1789 b 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 TOI-1789 b is an epic exoplanet

TOI-1789 b scores 57 points on Spacedle's rarity scale, which places it in the epic tier. Another 11 points would lift it into a rarer tier.

That score comes from 7 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter, Lava world, Puffy low-density world, 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.