James Webb Telescope Finds — Then Loses — Giant Exoplanet Near Alpha Centauri That May Have Water

Robert Starling    Senin, Agustus 11, 2025    Comment   

James Webb Telescope Finds — Then Loses — Giant Exoplanet Near Alpha Centauri That May Have Water

Illustration of a giant exoplanet near the star Alpha Centauri A observed by the James Webb Space Telescope.

An international team of astronomers has made a surprising discovery. In 2024, the James Webb Space Telescope detected a giant exoplanet about the size of Saturn near Alpha Centauri A, one of the closest stars to Earth. 

But in 2025, efforts to locate the planet again completely failed. Scientists suspect the planet temporarily “vanished” by being hidden in the glare of its star, making it invisible to Webb’s instruments.

Based on researchers’ calculations, the object could reappear in 2026 or 2027. If confirmed, it would become the closest known world located in the habitable zone—the region around a star where liquid water could exist. However, its massive size makes the likelihood of Earth-like life very low. 

“The signal was extremely faint, right at the edge of the telescope’s capabilities. Any conclusions will require independent verification,” said one of the scientists involved in the study.

Alpha Centauri is a triple-star system made up of Alpha Centauri A, Alpha Centauri B, and the red dwarf Proxima Centauri. 

Located just four light-years away, it’s considered a prime target for searching for planets beyond our solar system. 

To observe the mysterious object, the team used Webb’s infrared instrument equipped with a coronagraph—a device that blocks starlight to reveal fainter objects nearby.

In 2027, the search will be joined by the upcoming Nancy Grace Roman Space Telescope. It’s expected to scan an area of the sky 100 times larger than Hubble with comparable resolution and will feature an experimental coronagraph for directly imaging exoplanets. 

With both telescopes working together, the chances of confirming this giant planet’s existence could greatly improve, potentially opening a new chapter in the search for alien worlds.

Perseverance Captures Clearest-Ever Panorama of Mars

Robert Starling    Sabtu, Agustus 09, 2025    Comment   

Perseverance Captures Clearest-Ever Panorama of Mars

High-resolution panorama of Mars from NASA’s Perseverance rover, showing a rock drill site, hills 65 km away, and a large boulder on crescent-shaped sand ripples.

NASA has once again grabbed the attention of space enthusiasts. The Perseverance rover has captured the clearest panorama of Mars since the start of its mission in 2021. The images were taken during a rare dust-settling event in the Martian atmosphere in early August 2025, right at Jezero Crater, the rover’s main exploration site.

This stunning panorama is made up of 96 high-resolution images taken over several days while the planet’s dust was unusually calm — a phenomenon that only occurs about once every two years. NASA’s imaging team used this perfect window to produce an incredibly detailed view. The scene clearly shows a white drill mark from a rock sampling operation in the foreground, distant hills located about 65 kilometers away, and tire tracks marking Perseverance’s journey to the shooting location.

One of the most intriguing details in the panorama is a large boulder resting on crescent-shaped sand ripples. Scientists have nicknamed it the floating rock because its position seems oddly out of place. NASA researchers believe it may have been moved there by strong winds, ancient water flow, or even a landslide. “Its exact origin remains a mystery we’re eager to solve,” NASA’s team noted in an official statement.

This image isn’t just a showcase of Perseverance’s powerful camera — it also serves as valuable data for studying Mars’ geology. With a view much cleaner than usual, scientists can better analyze soil textures, wind patterns, and potential future sampling sites. NASA plans to release an interactive version of this panorama soon, allowing the public to “explore” Mars in unprecedented detail.

Curiosity Finds ‘Coral’ on Mars, Strong Evidence the Red Planet Once Had Oceans

Robert Starling    Sabtu, Agustus 09, 2025    Comment   

Curiosity Finds ‘Coral’ on Mars, Strong Evidence the Red Planet Once Had Oceans

Coral-like rock formation found on Mars by NASA’s Curiosity rover.

NASA’s Curiosity rover has made another fascinating discovery on Mars. This time, the robotic explorer spotted a rock on the planet’s surface that looks strikingly similar to sea coral found on Earth. While it’s not a living organism, scientists say the formation likely dates back billions of years when Mars still had oceans, according to a NASA statement on Friday (Aug 8, 2025).

NASA explained that these coral-like structures formed when minerals seeped into cracks in the rock, and flowing water eventually evaporated, leaving behind crystal deposits. Over time, Martian winds shaped them into the intricate patterns we see today. “Formations like this are traces of Mars’ wet past and its potential habitability,” said a spokesperson for the Curiosity science team.

Coral-like rock formation found on Mars by NASA’s Curiosity rover.

The discovery also strengthens the theory that Mars’ water didn’t completely vanish. Most of it now exists as ice at the poles, but some scientists believe there could still be liquid water hidden beneath the surface—possibly in underground oceans. “Every unique mineral structure gives us another piece of the puzzle to understand Mars’ geological history,” NASA added.

This find joins a growing list of “oddities” captured on Mars. In previous missions, Curiosity and its newer counterpart, the Perseverance rover, have photographed rocks shaped like a “donut,” an “avocado,” as well as formations resembling a “cat’s face” and a “bear’s snout.” While they may look like fun coincidences, these images serve as valuable visual evidence for future research, including the search for signs of ancient life on the Red Planet.