hot jupiter tagged posts

A planet about 950 light years from Earth could be the Looney Tunes’ Yosemite Sam equivalent of planets, blowing its atmospheric ‘top’ in spectacular fashion.

The planet called HAT-P-32b is losing so much of its atmospheric helium that the trailing gas tails are among the largest structures yet known of an exoplanet, a planet outside our solar system, according to observations by astronomers.

Three-dimensional (3D) simulations on the Stampede2 supercomputer of the Texas ...

The search for exoplanets—planets that orbit stars located beyond the borders of our solar system—is a hot topic in astrophysics. Of the various types of exoplanets, one is hot in the literal sense: hot Jupiters, a class of exoplanets that are physically similar to the gas giant planet Jupiter from our own neighborhood.

Unlike “our” Jupiter, hot Jupiters orbit very close to their stars, complete a full orbit in just a few days or even hours, and—as their name suggests—have extremely high surface temperatures. They hold great fascination for the astrophysics community...

When our sun reaches the end of its life, it will expand to 100 times its current size, enveloping the Earth. Many planets in other solar systems face a similar doom as their host stars grow old. But not all hope is lost, as astronomers from the University of Hawaiʻi Institute for Astronomy (UH IfA) have made the remarkable discovery of a planet’s survival after what should have been certain demise at the hands of its sun.

The Jupiter-like planet 8 UMi b, officially named Halla, orbits the red giant star Baekdu (8 UMi) at only half the distance separating the Earth and the sun...

An international team of astronomers has found the atmospheric compositions of giant planets out in the galaxy do not fit our own solar system trend.

Using NASA’s James Webb Space Telescope (JWST), the researchers discovered that the atmosphere of exoplanet HD149026b, a ‘hot Jupiter’ orbiting a star comparable to our sun, is super-abundant in the heavier elements carbon and oxygen — far above what scientists would expect for a planet of its mass.

These findings, published in “High atmospheric metal enrichment for a Saturn-mass planet” in Nature on March 27, provide insight into planet formation.

“It appears that every giant planet is different, and we’re starting to see those differences thanks to JWST,” said Jonathan Lunine, professor in the physical sciences at Cornell Univ...