Space Exploration 26 October 2025 - 7 November 2025

Updated: November 7, 2025 — Interstellar comet 3I/ATLAS has re-emerged from behind the Sun and is back on astronomers’ morning watch lists. Fresh coverage today highlights new imagery from Mars orbit, public tools to follow its path, and why agencies are mobilizing to study only the third confirmed interstellar object ever seen. Space+2WIRED+2 The comet is again observable from Earth in the pre‑dawn sky, very low toward the eastern horizon. It remains a small‑telescope target, but experienced observers with a dark site and a clear low east can spot and image it as it brightens briefly post‑perihelion before fading through December. For coordinates and real‑time ephemerides, use JPL Horizons or public dashboards such as TheSkyLive and NASA’s Eyes. heise online+1

Published: November 7, 2025 Summary

Today’s big development: China’s Tianwen‑1 Mars orbiter captured and released new images of the interstellar comet 3I/ATLAS, taken from roughly 30 million km away during the comet’s October 3 pass near Mars. China’s state outlets say the sequence shows clear cometary features and marks one of the closest probe‑based looks at the object to date. The observation doubles as a technology pathfinder for China’s upcoming Tianwen‑2 mission. State Council of China+2Xinhua News+2 Context: ESA’s TGO produced the closest European look on Oct. 3; the team emphasized just how challenging it is to resolve such a faint, fast‑moving target from Mars orbit. European Space Agency

Updated: 6 November 2025 — A rapid, reader-friendly briefing on the third interstellar object ever found, tailored for Google News & Discover. China’s space agency says the Tianwen‑1 Mars orbiter used its high‑resolution camera to observe 3I/ATLAS during the object’s close pass by Mars, when the spacecraft was ~30 million km from the comet—one of the nearest probe‑based looks so far. The agency released images and a brief 30‑second sequence showing the comet’s motion, adding that the observation also serves as a technical pathfinder for future small‑body missions. Xinhua News

When astronomers spotted a faint new comet on July 1, 2025, they quickly realized it was no ordinary comet. Its official designation, 3I/ATLAS, tells the tale: “3I” means it’s the third interstellar object ever recorded, and “ATLAS” credits the Asteroid Terrestrial-Impact Last Alert System survey telescope that discovered itscientificamerican.com. In the days following discovery, observatories around the world rushed to calculate its orbit – and the results were stunning. Unlike normal comets bound in elliptical orbits around the Sun, 3I/ATLAS was on a one-way hyperbolic trajectory, unbound to our stareconomictimes.indiatimes.com. It was barreling into the inner solar system at nearly 137,000 mph relative to the Sunscientificamerican.com – far too fast to have originated here. Projecting its path backward revealed that it came from far outside the solar system, and once it swings past the Sun, it will escape back into interstellar space rather than looping back aroundeconomictimes.indiatimes.comnewsweek.com. “It’s only the third time in history we’ve witnessed an object from another star passing through our neighborhood,” notes a NASA scientist, emphasizing how special each interstellar visitor iseconomictimes.indiatimes.com. The first was the needle-shaped asteroid ‘Oumuamua in 2017, and the second was Comet 2I/Borisov in 2019. Now 3I/ATLAS “joins the ranks” of these

On July 1, 2025, astronomers in Chile spotted a faint, fast-moving object that immediately stood out. Follow-up measurements showed it was on a hyperbolic orbit – not bound to our Sun – confirming it came from interstellar spacets2.tech. The discovery was officially designated 3I/ATLAS, where “3I” denotes the third Interstellar object ever observed, and “ATLAS” credits the NASA-funded Asteroid Terrestrial-impact Last Alert System survey that found itts2.tech. This find electrified scientists. “This is only the third such interstellar comet we’ve ever been able to study, and planetary scientists are super excited to learn about what comets in other solar systems are like,” said Jason Wright, an astronomer at Penn Statenewsweek.com. Every planet, moon, and comet we’ve seen up to now originated in our Solar System – but 3I/ATLAS is a true outsider, carrying clues from a world beyond our ownesa.int. It offers a rare chance to sample material from another star’s planetary disk, essentially a frozen messenger from a far-off system.

Image: Interstellar comet 3I/ATLAS, captured by the Gemini South Observatory in late 2025, showing a diffuse coma and tail against the stars. This “ghostly” haze of gas and dust confirms that 3I/ATLAS is an active comet venting material as it nears the Sun. Space Wikipedia Comet 3I/ATLAS is a rare celestial visitor that truly doesn’t belong in our solar system. Officially designated 3I/ATLAS, it was first spotted on July 1, 2025 by an ATLAS telescope in Chile Esa Wikipedia. Within days, astronomers realized this object was on a hyperbolic trajectory – in other words, it isn’t bound to the Sun by gravity and is just passing through our neighborhood Wikipedia. That immediately marked it as interstellar, originating from beyond the solar system. “This is an object from a part of the galaxy we’ve never seen up close before,” noted Oxford astronomer Chris Lintott, whose team studied 3I’s orbit Ras. Scientists estimate that 3I/ATLAS may have been traveling through interstellar space for billions of years, possibly formed around an ancient star long before our Sun existed ts2.tech Ras.

Comet 3I/ATLAS was discovered on July 1, 2025 by the Asteroid Terrestrial-impact Last Alert System survey telescope at Río Hurtado, Chileesa.int. ATLAS – a NASA-funded sky survey designed to spot incoming asteroids – detected a faint magnitude ~18 object moving against the starry backgroundras.ac.uk. Initially catalogued as C/2025 N1 under comet naming conventions, the object raised immediate excitement because its orbit did not appear bound to the Sunts2.tech. Within days, astronomers determined the new comet was on a highly hyperbolic trajectory, not a closed ellipse like ordinary comets. In August 2025 the International Astronomical Union confirmed its interstellar nature and redesignated it 3I/ATLAS, marking it as the third interstellar object ever observeden.wikipedia.org. This celestial visitor is sometimes also referred to by its survey designation “A11pl3Z,” but the name 3I/ATLAS reflects its extraordinary status beyond the Solar System. “This is an object from a part of the galaxy we’ve never seen up close before.” – Astronomer Matthew Hopkins, University of Oxfordts2.tech

NASA’s Moon program reached a major milestone this week: engineers at Kennedy Space Center finished stacking the Space Launch System rocket for Artemis 2, placing the Orion crew capsule atop the boosterspace.com. “The towering rocket…has come together,” NASA announced, after hoisting Orion onto SLS inside the Vehicle Assembly Buildingspace.com. This completed rocket – set to launch four astronauts around the Moon – was even exempted from the ongoing federal shutdown, underscoring Artemis 2’s high priorityspace.com. The mission is targeting February 2026 for liftoff, which would mark the first crewed journey beyond Earth orbit since Apollo 17 in 1972space.comspace.com. Acting Administrator Sean Duffy confirmed Artemis 2 remains on schedule, but he acknowledged growing concerns about Artemis 3, the first lunar landing mission. In a candid CNBC interview, Duffy criticized SpaceX’s slow progress on its Starship lander: “I love SpaceX… The problem is, they’re behind. They’ve pushed their timelines out, and we’re in a race against China”space.com. China has announced plans for its own crewed Moon landing by 2030, and the White House has pressed NASA to beat that datets2.tech. “The president and I want to get to the Moon in this president’s term,” Duffy emphasizedspace.com.

An interstellar vagabond is currently streaking through our Solar System, and it’s making waves both in the scientific community and the public imagination. Officially designated 3I/ATLAS, this object is only the third interstellar visitor ever observed – a comet from another star now paying us a brief visitts2.tech. First detected on July 1, 2025 by the ATLAS sky-survey telescope in Chile, 3I/ATLAS immediately stood out: it was moving extremely fast on a one-way hyperbolic trajectory, meaning it is unbound to the Sun and came from far outside our Solar Systemts2.tech. Its inbound path traced back to no known origin within the Solar System, confirming that 3I/ATLAS originated in the depths of interstellar space. This discovery comes on the heels of two prior interstellar objects – the needle-shaped 1I/ʻOumuamua in 2017 and the icy comet 2I/Borisov in 2019ts2.tech. Each of these cosmic interlopers was unique: ʻOumuamua was small, tumbling and showed no cometary coma, whereas Borisov looked and behaved much like a typical small comet from our own Oort Cloud. 3I/ATLAS, however, is breaking the mold yet again. It is larger and far more active than ʻOumuamua, sporting a visible coma and tail, yet it also exhibits puzzling features that haven’t

In recent weeks astronomers have been fascinated by the interstellar comet 3I/ATLAS as it rushes through the inner Solar System. First spotted by the ATLAS telescope on July 1 ts2.tech, it turned out to be moving so fast on a hyperbolic path that it could only have come from outside our solar neighborhood. Follow-up orbits confirm it is on a one-way trip, never to return ts2.tech. Importantly, orbital calculations show its minimum distance from Earth is about 1.8 AU ts2.tech, so it will not collide with us. In fact, the comet’s closest brush with any planet was on Oct. 3, 2025, when it passed ~30 million km from Mars. On that date ESA’s ExoMars Trace Gas Orbiter and Mars Express imaged 3I/ATLAS – despite its extreme faintness – giving the first close-up pictures of an interstellar comet Esa Esa. Ground-based telescopes have also captured 3I/ATLAS’s activity. New images released in mid-October show the nucleus surrounded by a large, fan-shaped coma, with a narrow jet of ice and dust erupting on the Sun-facing side Space Livescience. As Space.com reports, “an interstellar comet is dramatically jetting off ice and dust into space” in the direction of the Sun Space. The jet extends