This artist’s animation shows Cha 1107-7626. Located about 620 light-years away, this rogue planet is about 5-10 times more massive than Jupiter and doesn’t orbit a star. The planet is eating up material from a disc around it and, using ESO’s Very Large Telescope (VLT), astronomers have discovered that it is now doing so at a rate of six billion tonnes per second –– the fastest ever found for any kind of planet. The team suspects that strong magnetic fields could be funnelling material towards the planet, something only seen in stars before.
When the infalling material reaches the planet it heats up its surface, creating a bright hot spot. The X-shooter spectrograph on ESO’s VLT detected a marked brightening in mid-2025, and found a clear fingerprint that this was caused by infalling gas. The observations show that the planet is now accreting matter about 8 times faster than a few months before.
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This is purely about the world's structure, its climate, relief and country borders
First of all, the planet's structure:
And here are relief, climate and political maps
I want to point out how climate zones work here. I figured out how can I make the Pyrrhia desert work: it's surrounded by tall mountains, making cold winds unable to get through, while southern part is a low plain, warm winds cross it easily, making it a wetland with all the rivers and lakes it has. Meanwhile the Pyrrhia's head is not entirely covered in snow - only the most northern part is an arctic, and most of it is tundra and cold forest.
One of the most extreme known exoplanets could be more harsh than previously thought, according to researchers sharing the James Webb Space Telescope’s latest observations of HD 80606 b today at the American Astronomical Society meeting in Pasadena, California.
The planet is seen here in an artist’s concept.
Webb’s powerful instruments show that HD 80606 b’s temperature swings are even more extreme than detected by its predecessor, the now-retired Spitzer Space Telescope. Both saw that the planet’s exaggerated elliptical orbit resulted in huge temperature swings.
Initial analysis of Webb's results show that the planet's temperature can jump by 1,100 degrees Fahrenheit (600 degrees Celsius) as it speeds by its Sun-like star.
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The constellation of Delphinus, the Dolphin // E. Slawik/NOIRLab/NSF/AURA/M. Zamani
Click below to read more about my favorite constellation as well as an annotated image!
Delphinus, which is Latin for "dolphin," is the first of the constellations in the "Heavenly Waters" family. This is an area of sky between Sagittarius and Orion filled with dim constellations all associated with water thanks to the Mesopotamians.
Delphinus is one of the smaller constellations, but it is one of the original 48 constellations written about by Greek astronomer Ptolemy in the 2nd century. According to Greek mythology, this dolphin was sent out by Poseidon to find the nereid Amphitrite whom Poseidon wanted to marry. Delphinus did find Amphitrite and convinced her to accept Poseidon's hand in marriage.
There are several named stars here. In order of brightness:
Rotanev (β Delphini) is a binary star system consisting of two equally-bright yellow-white giant stars. The system lies about 101 light years away. Its name has an origin in a practical joke! The Italian astronomer Niccolò Cacciatore worked at and eventually led the Palermo Observatory. His boss, Giuseppe Piazzi published a star atlas, and attached to this star was the obscure name "Rotanev." Niccolò had added this name in honor of himself! His name in English was Nicholas Hunter, which is Latinized to Nicolaus Venator. "Venator" backwards is "Rotanev"!
Sualocin (α Delphini) is an octuple star system with a central triple system consisting of at least one blue-white giant. The entire system lies about 254 light years away. Its name shares its origin with Rotanev: "Sualocin" is "Nicolaus" backwards!
Aldulfin (ε Delphini) is a solitary blue giant star about 330 light years away. Its name comes from the Arabic phrase ðanab ad-dulfīn meaning "the dolphin's tail."
Musica (18 Delphini) is a binary star system consisting of a yellow giant and a red dwarf. The system lies about 245 light years away. It has one confirmed exoplanet orbiting it, about 9 times the mass of Jupiter, named Arion. Both names were given by the people of Japan: Musica is Latin for "music," while Arion is a Greek poet and musician who was supposedly saved at sea by dolphins.
Moriah (HAT-P-23) is a solitary Sun-like star about 1,192 light years away. It has one confirmed exoplanet orbiting it, about twice the mass of Jupiter, named Jebus. Both names were given by the people of Palestine: Moriah is an ancient name for the mountain inside the Old City of Jerusalem, while Jebus is the ancient name for Jerusalem.
