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At the heart of our galaxy lies Sagittarius A*—a supermassive black hole with a mass four million times that of the Sun. For years, astronomers believed its immense tidal forces would shred any object that ventured too close. But new observations from the European Southern Observatory’s Very Large Telescope (VLT) in Chile, using the advanced instrument ERIS, tell a different story: several enigmatic “dusty objects” are not only surviving—they’re thriving in stable orbits.

On July 2, 2025, NASA’s Fermi satellite recorded an extraordinary cosmic event: a gamma-ray burst so unusual it triggered the detector three times over several hours. Dubbed GRB 250702DBE, this source defies standard classifications. Now, a team from the Yunnan Observatories of the Chinese Academy of Sciences has uncovered something even more surprising within the data—quasi-periodic oscillations (QPOs)—offering vital clues to its mysterious origin.

The image illustrates two theoretical models of energy transfer between dark matter and dark energy: Model 1 depicts dark matter decaying into dark energy, resulting in elongated halos and stronger cosmic web alignment; Model 2 shows dark energy converting into dark matter, leading to compact halos with weaker cosmic web alignment. These models aim to address major cosmic challenges and assist in future astronomical surveys.

In early 2025, scientists analyzing data from the James Webb Space Telescope (JWST) identified three extraordinary objects in the distant universe. These candidates—extremely bright, very redshifted, and helium-rich—match theoretical predictions for “dark stars”: hypothetical, supermassive objects powered not by nuclear fusion, but by the annihilation of dark matter particles.

In the early 1930s, Swiss astronomer Fritz Zwicky noticed galaxies spinning faster than their visible mass could explain. He proposed an invisible substance—dark matter—as the cosmic glue holding them together.

An international team led by researchers from The University of Hong Kong (HKU) has made a major breakthrough in planetary science: for the first time, they have systematically classified six distinct tectonic regimes that govern how rocky planets evolve.

The outer planets of the solar system are swarmed by ice-wrapped moons. Some of these, such as Saturn's moon Enceladus, harbor hidden oceans of liquid water between an icy crust and a rocky core—making them prime candidates in the search for extraterrestrial life.

Dusty Star-Forming Galaxies (DSFGs) are the monsters of the early universe. They churn out stars at incredible rates—sometimes thousands of solar masses per year. But they are notoriously hard to find because they are shrouded in thick clouds of dust that block visible light. Recently, a team led by Longji Bing was inspecting the COSMOS field when they stumbled upon a surprise: a massive galaxy, designated AC-2168, existing just 800 million years after the Big Bang.

Tracing the origins of Earth's lost neighbor, Theia: 4.5 billion years ago, a collision with this Mars-sized body led to the formation of the Moon. Scientists analyze isotopic fingerprints in rocks to uncover Theia's history, suggesting it once orbited closer to the Sun alongside Earth.

Cosmic rays constantly bombard Earth, but their energy spectrum isn't a smooth line. Around 3 PeV (quadrillion electron volts), the number of rays drops sharply, creating a "knee" in the graph. The cause of this drop has been a mystery for nearly seven decades. Now, groundbreaking results from the Large High Altitude Air Shower Observatory (LHAASO) have pinpointed the source of these high-energy particles: micro-quasars within our own Milky Way.

Ancient Mars was wet, but is there liquid water today? In 2018, the MARSIS radar instrument detected a bright reflection under the south polar ice, suggesting a 20km-wide buried lake. This would be huge for habitability. But keeping water liquid there requires impossible amounts of salt or heat. Now, a second radar instrument, SHARAD, has taken a closer look using a special maneuver, and the results challenge the "lake" theory.

A visual representation of recent discoveries and questions regarding the Kuiper Belt's structure. The analysis of 1,650 objects reveals a 'kernel' with circular orbits, raising possibilities of a larger structure or an additional distinct entity. The Vera C. Rubin Observatory aims to provide further clarity on this cosmic mystery.