Uncommon exoplanet 31 EP

WASP-177 b

RA 334.7970° · Dec -1.8344° · exoplanet

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Score breakdown

· 4 badges

31 pts · Uncommon

Uncommon 33 pts → Rare

Puffy low-density world +12
Hot Jupiter +10
Confirmed exoplanet +5
Gas giant +4

Total score 31

2 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Puffy low-density world · +12

Trivia

What makes it special

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. ≈ 10.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 900.5 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 5767 years in a starship at a tenth of light speed.
Distance. 577 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1449.

Saying hello

Say hello. A radio message and its reply would take 1153 years round-trip.

Standing on it

A year here. A full year lasts just 3.1 Earth days.

By the numbers

Size. About 17.7× the width of Earth.
Volume. About 5555 Earths could fit inside it.
Mass. Roughly 161× Earth's mass — about 0.5 Jupiters.
Your weight. You'd weigh about 0.5× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. Around 869°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by SuperWASP using the transit method.

Properties

density gcc: 0.172
discovery facility: SuperWASP
discovery method: Transit
dist ly: 576.7025
eq temp k: 1142
insolation: 279.7736
mass earth: 161.4576
name: WASP-177 b
orbital period days: 3.0717
radius earth: 17.7102
sys num planets: 1

About WASP-177 b

WASP-177 b is an uncommon exoplanet. It lies about 576.7 light-years from Earth, has an equilibrium temperature near 1,142 K, spans roughly 17.71 Earth radii and weighs about 161.46 Earth masses.

So low-density it would float on water.

How to see it

Like any astronomical target, WASP-177 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 WASP-177 b is an uncommon exoplanet

WASP-177 b scores 31 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Puffy low-density 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.