About TWA 7 b
TWA 7 b is an epic exoplanet. It lies about 110.9 light-years from Earth, has an equilibrium temperature near 316 K, spans roughly 12.7 Earth radii and weighs about 108.06 Earth masses.
So low-density it would float on water.
Epic exoplanet 57 EP
TWA 7 b
RA 160.6248° · Dec -33.6713° · exoplanet
Score breakdown
· 5 badgesEpic 68 pts → Anomaly
- Found by JWST +20
- Directly imaged +16
- Puffy low-density world +12
- Confirmed exoplanet +5
- Gas giant +4
Total score 57
11 more points to reach Anomaly.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Puffy low-density world · +12
- Found by JWST · +20
- Directly imaged · +16
Trivia
What makes it special
- Cotton-candy planet. So low-density it would float on water.
- JWST find. Discovered by the James Webb Space Telescope.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 1.9 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 173.1 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 1109 years in a starship at a tenth of light speed.
- Distance. 111 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1915.
Saying hello
- Say hello. A radio message and its reply would take 222 years round-trip.
By the numbers
- Size. About 12.7× the width of Earth.
- Volume. About 2048 Earths could fit inside it.
- Mass. Roughly 108× Earth's mass — about 0.3 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. A surprisingly temperate 43°C average.
How we found it
- Discovery. Found by James Webb Space Telescope (JWST) using the imaging method.
Properties
- density gcc
- 0.29
- discovery facility
- James Webb Space Telescope (JWST)
- discovery method
- Imaging
- dist ly
- 110.8793
- eq temp k
- 316
- insolation
- 0
- mass earth
- 108.0617
- name
- TWA 7 b
- radius earth
- 12.7
- sys num planets
- 1
How to see it
Like any astronomical target, TWA 7 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 TWA 7 b is an epic exoplanet
TWA 7 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 5 science badges — Confirmed exoplanet, Gas giant, Puffy low-density world, Found by JWST and Directly imaged — 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.