The planets / 55 Cancri e / Janssen

55 Cancri e / Janssen · Artist's Reconstruction

Buy A Galaxy · original commissioned reconstruction

Artist's Reconstruction · View astronomy source

Artist's ReconstructionFull image credit, source & interpretation

Artist's reconstruction based on published astronomical observations and current scientific understanding.

A real exoplanet. A very personal interpretation.

55 Cancri e / Janssen

Name: 55 Cancri e / Janssen personalised planet gift
Brand: Buy A Galaxy

Official catalogue designation: 55 Cancri e

Your name for it: Planet Brenda

An intensely heated rocky world, orbiting so close to its star that its year lasts less than a day.

Planet type: Rocky super-Earth
Distance from Earth: c. 41 light-years
Constellation: Cancer
Planet radius: 1.875 × Earth
Host star: 55 Cancri A
Orbital period: c. 0.7 days

Values are rounded estimates and may be refined by further observations. Personal names remain ceremonial.

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A personalised planet gift preview. No order or reservation is made.

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Planet nameFor example, Planet Brenda. Completely unofficial. Up to 60 characters.

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At launch, digital editions are available worldwide. A4, A3 and Framed A3 packages are available in the UK, with international print delivery planned.

Your gift formatDigital EditionPersonalised poster, certificate and object information sheet as digital files. Available worldwide.£9.99A4 Print PackageTwo physical A4 pieces: a personalised poster and certificate, plus a printed information sheet. United Kingdom only at launch · international print delivery planned.£22.99A3 Print PackageMOST POPULARA larger A3 poster with a separate A4 printed certificate and printed information sheet. United Kingdom only at launch · international print delivery planned.£34.99Framed A3 PackageA framed A3 poster, separate A4 printed certificate and printed information sheet, with digital poster and certificate copies. United Kingdom only at launch · international print delivery planned.£49.99

Illustrative launch pricing. Ordering opens on 23 October 2026.

Poster in the approved design for 55-cancri-e, personalised as Planet Brenda

A3 Print Package

A3 poster + A4 printed certificate. Information sheet included.

Planet-Poster in the approved design for 55-cancri-e, personalised as Planet Brenda

Planet-Certificate in the approved design for 55-cancri-e, personalised as Planet Brenda

Paper sizes shown in proportion. Tap either piece to inspect your personalisation.

Live preview · your selected galaxy and personalisation.
Registration number is a demonstration, not a saved registry entry. Artwork image credit

A world with a story

More than a beautiful planet.

Host star: 55 Cancri A
Star type: K-type star
Planet radius: 1.875 × Earth
Planet mass: 7.99 × Earth
Orbital period: c. 0.7 days
Orbital distance: 0.01544 AU
Discovery: 2004 · Radial velocity

Values are rounded from published catalogue measurements. Sky coordinates identify the host system, not a resolved planetary surface.

A world built for extremes

55 Cancri e is a super-Earth: a planet larger than Earth, rather than a promise of Earth-like conditions. Its close orbit makes it one of the most striking known examples of a highly irradiated rocky world.

Where is Janssen?

Its host system lies in Cancer, about 41 light-years away. Janssen is the recognised proper name for 55 Cancri e. Your gift name remains a personal dedication; it does not replace either astronomical name.

What the observations tell us

Webb observations reported in 2024 support a secondary atmosphere, possibly containing carbon monoxide or carbon dioxide, above a likely molten surface. The gases and their abundance remain questions for research, rather than settled ingredients for a holiday brochure.

What might it look like?

Our reconstruction uses molten light, dark rock and a heated limb to express the extreme conditions. The pattern of lava cracks, visible surface texture and exact haze are artistic choices. No telescope has photographed those features.

How was it discovered?

The catalogue records a 2004 radial-velocity discovery. This method detects changes in a star’s motion caused by orbiting planets. Subsequent transit and infrared observations have helped astronomers investigate the planet’s size and atmosphere.

A rather personal inferno

Choose a ceremonial name and dedication for a planet poster with its real designation, host star and orbital information. The certificate records the gift naming; it conveys no ownership, scientific recognition or exclusive claim.