This hellish planet is so hot it has clouds of glass and an atmosphere of vaporized metal

NASA discovers extreme planet: A giant planet far beyond our solar system is giving scientists a rare chance to watch an alien world change almost in real time. Using NASA's James Webb Space Telescope, researchers observed HD 80606 b, a massive gas giant whose temperature rises by about 1,100°F as it races toward its Sun-like star, as per a report.

The planet is already one of the most extreme worlds scientists have studied. As it swings close to its star, its atmosphere heats up dramatically, allowing researchers to observe how temperatures and atmospheric conditions change over a very short period.

James Webb captures a dramatic temperature surge

HD 80606 b is about four times the mass of Jupiter and completes one orbit around its star every 111.4 days, as per an Eco News report.


Unlike most "hot Jupiters," which remain close to their stars, this planet follows a highly stretched orbit. NASA lists its orbital eccentricity at 0.93, meaning it spends much of its orbit farther away before rushing inward for an intense burst of stellar heat.

To capture this event, scientists used Webb's Mid-Infrared Instrument (MIRI) to observe the planet before, during, and after periastron, the point where it comes closest to its star.

During this close approach, Webb recorded the planet's temperature rising by approximately 1,100°F, a much stronger increase than earlier observations from NASA's Spitzer Space Telescope had suggested, as per the Eco News report.

A giant planet with one of the most extreme orbits known

HD 80606 b is not an Earth-like planet. It is a massive gas giant where extreme heating dominates its atmosphere.

Its unusual orbit makes it especially valuable for scientists because they can watch its atmosphere respond as conditions rapidly change over a single orbit instead of remaining relatively constant.

NASA's exoplanet catalog notes that the planet was discovered in 2001, and its highly elongated orbit makes it one of the most unusual giant planets known.

Webb reads the planet's atmosphere through light

To study the planet, researchers used spectroscopy, a technique that separates light into different wavelengths.

By analyzing that light, scientists can identify clues about the planet's temperature, motion, and chemical composition.

Researchers explained that Webb can distinguish atmospheric chemical signatures, including gases such as methane and carbon dioxide, providing a much clearer picture of how the atmosphere changes during the planet's closest approach to its star, as per the Eco News report.

Building on Spitzer's earlier discoveries

Before Webb, NASA's Spitzer Space Telescope had already observed HD 80606 b in infrared light, helping establish it as one of the most unusual exoplanets ever discovered.

Those earlier observations earned it the nickname "the roasted exoplanet."

Webb has now expanded on those findings with much more detailed spectroscopic observations, revealing an even greater temperature increase than scientists previously expected.

According to principal investigator Tiffany Kataria of NASA's Jet Propulsion Laboratory, HD 80606 b is "one of the most extreme" hot Jupiters because its unusual orbit makes it behave very differently from other gas giants that remain close to their stars, as per the Eco News report.

A natural laboratory for studying alien atmospheres

Researchers say HD 80606 b offers a rare opportunity to observe how a giant planet's atmosphere reacts to rapidly changing conditions.

Co-investigator Laura C. Mayorga said the planet provides an efficient way to study atmospheric changes because a single orbit allows scientists to observe dramatic shifts in temperature and chemistry, as per the Eco News report.

Since the planet repeats this cycle every 111.4 days, it gives astronomers repeated opportunities to study how giant planetary atmospheres respond to sudden and intense heating.

Scientists are only beginning to study the data

The research team says it has only begun analyzing Webb's observations.

While HD 80606 b itself is not considered a place where life could exist, its rapidly changing atmosphere offers scientists valuable insights into how giant exoplanets behave under extreme conditions.

Rather than focusing on a single unusual world, researchers hope these observations will improve their understanding of how planetary atmospheres evolve when exposed to sudden and uneven bursts of heat.

FAQs

What is HD 80606 b?
HD 80606 b is a gas giant exoplanet about four times the mass of Jupiter.

Why is this planet unusual?
It follows an extremely stretched orbit that brings it very close to its Sun-like star before moving far away again.