Uncommon exoplanet 24 EP

NGTS-4 b

RA 89.5989° · Dec -30.8118° · exoplanet

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Score breakdown

· 3 badges

24 pts · Uncommon

Uncommon 33 pts → Rare

Lava world +14
Confirmed exoplanet +5
Sub-Neptune +5

Total score 24

9 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Sub-Neptune · +5
Lava world · +14

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. ≈ 16.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 1.4 million years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 9150 years in a starship at a tenth of light speed.
Distance. 915 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1111.

Saying hello

Say hello. A radio message and its reply would take 1830 years round-trip.

Standing on it

A year here. A full year lasts just 1.3 Earth days.

By the numbers

Size. About 3.2× the width of Earth.
Volume. About 32.2 Earths could fit inside it.
Mass. About 20.6× the mass of Earth.
Your weight. You'd weigh about 2.0× your Earth weight standing here.
Temperature. Around 1377°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by Next-Generation Transit Survey (NGTS) using the transit method.

Properties

density gcc: 3.45
discovery facility: Next-Generation Transit Survey (NGTS)
discovery method: Transit
dist ly: 915.047
eccentricity: 0
eq temp k: 1650
insolation: 886.9841
mass earth: 20.6
name: NGTS-4 b
orbital period days: 1.3374
radius earth: 3.18
sys num planets: 1

About NGTS-4 b

NGTS-4 b is an uncommon exoplanet. It lies about 915 light-years from Earth, has an equilibrium temperature near 1,650 K, spans roughly 3.18 Earth radii and weighs about 20.6 Earth masses.

Its surface is likely an ocean of molten rock.

How to see it

Like any astronomical target, NGTS-4 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 NGTS-4 b is an uncommon exoplanet

NGTS-4 b scores 24 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 points would lift it into a rarer tier.

That score comes from 3 science badges — Confirmed exoplanet, Sub-Neptune and Lava world — 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.