Level 1 — Absolute Beginner
Scientists found something strange on a giant planet far away. People call this planet the 'Pink Planet.'
The planet's real name is GJ 504 b. It is 57 light-years from Earth. That is very, very far.
Scientists used a big space telescope called James Webb to look at the planet's sky. They found clouds made of salt.
No one has ever seen clouds like this before. The planet's air also has water, methane, and other gases.
- planet
- a large round object in space that moves around a star
- telescope
- a tool that makes far away objects in space look closer and bigger
- cloud
- a mass of tiny water or other droplets floating in the sky
- salt
- a mineral used in cooking, also found in nature in many forms
- light-year
- the distance light travels in one year, used to measure space distances
- atmosphere
- the layer of gases that surrounds a planet
- gas
- a substance, like air, that is not solid or liquid and spreads to fill a space
- strange
- unusual or surprising
Level 2 — Elementary
Astronomers led by a team at Northwestern University have discovered something unusual around GJ 504 b, a giant planet nicknamed the 'Pink Planet' because of its faint magenta glow.
The planet orbits a Sun-like star about 57 light-years from Earth and has a mass roughly 25 times that of Jupiter, placing it near the boundary between a large planet and a small brown dwarf star. It was first discovered in 2013 using direct imaging from Japan's Subaru Telescope in Hawaii.
Using the James Webb Space Telescope, the astronomers studied the planet's atmosphere in new detail and found skies filled with salty clouds, an exotic type of chemistry that had never been observed on a world like this one before.
The data revealed a mix of water vapor, methane, carbon dioxide, ammonia, and other molecules swirling in the planet's atmosphere. Scientists think the planet appears pink partly because it is extremely old, between 2.5 and 4 billion years, and relatively cold for its type.
- astronomer
- a scientist who studies stars, planets, and other objects in space
- magenta
- a bright purplish-pink color
- mass
- the amount of matter in an object, related to how heavy it is
- brown dwarf
- an object too small to be a full star but larger than a typical planet
- direct imaging
- a method of finding a planet by capturing an actual picture of it, rather than detecting it indirectly
- exotic
- unusual, foreign, or strikingly different from what is normal
- molecule
- a group of atoms bonded together, the smallest unit of a chemical substance
- swirl
- to move in a twisting, circular pattern
Level 3 — Intermediate
An international team of astronomers led by researchers at Northwestern University has used the James Webb Space Telescope to uncover an unusual feature surrounding GJ 504 b, a giant planet widely nicknamed the 'Pink Planet' for its faint magenta hue.
GJ 504 b orbits a Sun-like star roughly 57 light-years from Earth and carries a mass approximately 25 times that of Jupiter, placing it near the ambiguous boundary separating giant planets from brown dwarfs, objects too small to sustain the nuclear fusion that powers true stars. The planet was first identified in 2013 through direct imaging conducted with the HiCIAO instrument on Japan's Subaru Telescope in Hawaii.
Newly analyzed observations from Webb revealed an atmosphere packed with exotic chemistry, including skies filled with salty clouds unlike anything previously documented on a comparable world. The data showed a complex mixture of water vapor, methane, carbon dioxide, ammonia, and additional molecules circulating through the planet's atmosphere.
Researchers attribute the planet's distinctive pink coloration partly to its advanced age, estimated between 2.5 and 4 billion years, combined with its relatively cool temperature for an object of its type, a combination that produces a very different atmospheric chemistry than is seen on younger, hotter gas giants.
- hue
- a particular shade or tone of a color
- ambiguous
- not clearly defined; open to more than one interpretation
- nuclear fusion
- a process in which atomic nuclei combine, releasing enormous energy, which powers stars
- instrument
- a device used to perform a specific scientific task, such as capturing images
- circulate
- to move continuously through a system or area
- attribute
- to explain something as being caused by a particular factor
- coloration
- the particular combination of colors that something has
- comparable
- similar enough to be compared with something else
Level 4 — Advanced
An international team of astronomers led by researchers at Northwestern University has leveraged the James Webb Space Telescope to characterize an unusual atmospheric feature encircling GJ 504 b, a giant planet colloquially dubbed the 'Pink Planet' for its faint magenta hue.
GJ 504 b orbits a Sun-like star approximately 57 light-years distant and possesses a mass roughly 25 times that of Jupiter, situating it near the taxonomically ambiguous threshold separating giant planets from brown dwarfs, substellar objects too diminutive to sustain the hydrogen fusion that powers genuine stars. The planet was first identified in 2013 via direct imaging captured by the HiCIAO instrument mounted on Japan's Subaru Telescope in Hawaii, a landmark result at the time given how few exoplanets had ever been directly photographed.
Newly analyzed Webb observations disclosed an atmosphere replete with exotic chemistry, including skies dominated by salt-based clouds without precedent among previously characterized worlds of comparable class. Spectroscopic data revealed an intricate blend of water vapor, methane, carbon dioxide, ammonia, and supplementary molecular species circulating through the planet's upper layers.
Researchers attribute the planet's distinctive coloration to a confluence of factors, chiefly its considerable age, estimated between 2.5 and 4 billion years, coupled with a comparatively low temperature for an object of its category, a pairing that yields markedly different atmospheric photochemistry than typically observed among younger, hotter gas giants still radiating substantial residual heat from formation.
- leverage
- to use something to maximum advantage
- colloquially
- in an informal, everyday way of speaking rather than a formal or technical one
- taxonomically
- relating to the classification of things into categories
- substellar
- having a mass too small to become a true star
- spectroscopic
- relating to the analysis of light to determine the composition of a substance
- replete
- filled or well-supplied with something
- confluence
- a coming together of two or more things, especially factors or influences
- residual
- remaining after most of something has gone or been used
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