Perseverance Otkrio Izbelele Kaolinitne Stene Na Marsu — Tragovi Dugotrajnih Padavina i Mogućnost Davne Nastanjivosti

NASA-in rover Perseverance pronašao je izbelele, glinom bogate fragmente stena na površini Marsa — nalaz koji ukazuje na dugotrajan uticaj padavina i visoke vlažnosti u dalekoj geološkoj prošlosti planete.

Šta su istraživači otkrili?

U studiji objavljenoj u decembru u časopisu Communications Earth & Environment, tim naučnika opisao je bele, kaolinitne fragmente bogate aluminijumom. Kaolinit je glineni mineral koji na Zemlji nastaje dugotrajnim ispiranjima drugih minerala u toplim i vlažnim uslovima — što navodi na pretpostavku da su se slični procesi dešavali i na Marsu.

Kako su stene dospele u krater Jezero?

Uzorke, koji se kreću od šljunka do krupnih blokova, naučnici su pronašli rasute po području kratera Jezero. Pošto u neposrednoj blizini nema velikih izvorišta sličnih stena, moguće je da su fragmenti dopremljeni vodom tokom perioda kada je krater bio jezero, ili su raspršeni usled udara meteorita. Satelitske snimke takođe ukazuju na prisustvo većih nakupina kaolinitnih stena i u drugim oblastima Marsa.

Zašto je nalaz važan?

Vodeći autor studije, Adrian Broz (Purdue University), i kolege ističu da su kaolinitne stene teško nastale bez dugotrajnog delovanja vode. Kako Broz kaže, ovakvi nalazi sugerišu da je Mars u prošlosti imao znatno vlažniju klimu u kojoj su padavine i erozija trajali dovoljno dugo da izmenе mineralni sastav stena.

„To nam govori da je nekada postojalo mnogo više vode nego danas“, rekao je Broz u izjavi.

Ralph Horgan, planer dugoročnih aktivnosti na misiji Perseverance, napomenuo je da takve stene iz orbite izgledaju kao jedni od najznačajnijih izloženih slojeva upravo zato što je za njihov nastanak potrebno veliko i dugotrajno delovanje vode.

Šta ovo znači za potragu za životom?

Otkriveni kaolinitni fragmenti funkcionišu kao svojevrsna vremenska kapsula — mogu da čuvaju informacije o uslovima koji su vladali pre milijardi godina. Pošto je voda ključni sastojak za život kakav poznajemo, ovakvi dokazi povećavaju verovatnoću da su prebiotički uslovi ili čak mikrobiološki tragovi mogli postojati na Marsu u prošlosti. Ipak, naučnici naglašavaju da ovo nije direktan dokaz života, već važan geološki indikator dugotrajne vlažnosti.

Vremeplov misije Perseverance

Perseverance, lansiran 2020. godine, stigao je u krater Jezero u februaru 2021. posle oko 200 dana i približno 300 miliona milja (oko 480 miliona km) putovanja. Posle višegodišnjeg rada u Jezeru, rover je krajem 2024. započeo istraživanje ruba kratera kako bi nastavio prikupljanje uzoraka.

Autori studije upoređivali su marsovske uzorke sa stijenama sličnim onima iz oblasti u blizini San Dijega i Južne Afrike, što je dodatno pojačalo hipotezu da su procesi taloženja i ispiranja na Marsu nekada mogli biti slični tropskim uslovima na Zemlji.

Zaključak: Nalaz izbelelih kaolinitnih fragmenata daje snažan geološki dokaz da je Mars imao periode duže izloženosti vodi i vlažnijoj klimi. To ne dokazuje postojanje života, ali stvara važan kontekst za dalja istraživanja i traženje mogućih biosignatura.

Izvor: USA TODAY; studija u Communications Earth & Environment.

The High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA’s Mars Reconnaissance Orbiter captured this image of interstellar comet 3I/ATLAS on Oct. 2, 2025. At the time it was imaged, the comet was about 19 million miles from the spacecraft. The comet didn't come nearly as close to Earth, when it reached a distance of 170 million miles from our planet on Dec. 19.

This image shows the 3I/ATLAS interstellar comet as a bright, fuzzy orb in the center. Traveling through our solar system at 130,000 miles per hour, 3I/ATLAS was made visible by using a series of colorized stacked images from Sept. 11-25, using the Heliocentric Imager-1 (H1) instrument, a visible-light imager on the STEREO-A (Solar Terrestrial Relations Observatory) spacecraft. The colorization was applied to differentiate the image from other observing spacecraft images.

Because it's big enough to be deemed a "city killer," asteroid 2024 YR4 became a source of alarm due to the uncommonly high risk it had of colliding with Earth on Dec. 22, 2032. For a time, it was the only object among more than 37,000 known large space rocks with any chance of hitting Earth anytime soon – with its probability of impact even rising to a record level of 3.1%.That began to change in late February as more precise observations allowed scientists to effectively winnow down the asteroid's odds of impact to a number so low, it might as well be zero.

An exoplanet known as K2-18b achieved a degree of fame in April when a team of astronomers claimed to have found in its atmosphere "the strongest evidence yet" that life exists anywhere else besides Earth. Other scientists have since cast doubt on the findings – putting a damper on the notion that humanity finally had proof that we aren't alone in the cosmos.

This artist's concept shows what exoplanet K2-18b could look like based on scientific data. NASA's James Webb Space Telescope has observed K2-18b, an exoplanet 8.6 times as massive as Earth, revealing conditions that could support life on the exoplanet.

NASA’s Perseverance Mars rover is seen in a "selfie" that it took over on Sept. 10, 2021. Perseverance rover, along with Curiosity, is one of the agency's two car-sized robots exploring the Martian surface for signs that the planet was once habitable. And in September, NASA officials confirmed that one of the rovers’ finds contained a potential biosignature.

A reddish rock nicknamed "Cheyava Falls", with features resembling leopard spots was discovered by NASA's Perseverance rover in Mars’ Jezero Crater in July 2024, in this handout photograph released on September 10, 2025.

The northern lights, also known as the aurora borealis, light up the night sky Nov. 11 east of Denver, Colorado. A powerful geomagnetic solar storm in November blasted Earth and created the conditions necessary to reveal the auroras much further south in the United States than is typical.

A group of friends take photos of the northern lights Nov. 11 as they appear over Clinton Lake in Lawrence, Kansas. After NOAA's Space Weather Prediction Center issued a "severe" geomagnetic storm watch in November, many people in the Northern Hemisphere, which includes the U.S., had an extraordinary opportunity to gaze upon some breathtaking red and green auroras in their own backyard.

In June, the state-of-the-art Vera C. Rubin ground telescope in Chile unveiled its first stunning images of the cosmos. This particular image combines 678 separate images taken by the observatory in just over seven hours of observing time. Combining many images in this way clearly reveals otherwise faint or invisible details, such as the clouds of gas and dust that comprise the Trifid nebula (top) and the Lagoon nebula, which are several thousand light-years away from Earth.

NASA’s Perseverance Mars rover is seen in a "selfie" that it took over on Sept. 10, 2021. Perseverance rover, along with Curiosity, is one of the agency's two car-sized robots exploring the Martian surface for signs that the planet was once habitable. And in September, NASA officials confirmed that one of the rovers’ finds contained a potential biosignature.

Purdue University research into scattered kaolinite rocks on Mars’ surface shows the dry, dusty planet could have featured a rain-heavy climate billions of years ago.