Astronomy News 18 December 2025

Comet 3I/ATLAS Today: December 24, 2025 Updates on the Interstellar Visitor

December 24, 2025 — Comet 3I/ATLAS (also cataloged as C/2025 N1 (ATLAS)) is already past its closest point to Earth, fading and drifting outward again — but the science and the headlines are accelerating, not slowing down. Today’s developments include

24 December 2025

Astronomy·Comets·Interstellar Objects·Scientific Discoveries·Space News

Night Sky Tonight (Dec. 23, 2025): Crescent Moon Earthshine, Northern Lights Alert, and the Ursids’ Final ActNight Sky TonightNight Sky Tonight (Dec. 23, 2025): Crescent Moon Earthshine, Northern Lights Alert, and the Ursids’ Final Act

Dec. 23, 2025 — Tonight’s sky is doing that classic winter trick: it gets dark early, stays dark long, and then quietly hands you a few genuinely photogenic targets as a reward for being a warm-blooded mammal who chose to

23 December 2025

Astronomy·Meteor Showers·Night Sky·Northern Lights

Comet 3I/ATLAS Today (Dec. 23, 2025): New Spacecraft Data, X‑Rays, “Radio Signals,” and the Next Big Test at Jupiter

December 23, 2025 — Comet 3I/ATLAS, the third confirmed interstellar object ever seen passing through our solar system, is already on its way out. But the news cycle around it is still very much inbound. In the days following 3I/ATLAS’

23 December 2025

Astronomy·Comets·Space Exploration

Comet 3I/ATLAS Today (22 December 2025): The Latest Science, Spacecraft Views, and “Radio Signal” Reality Check

As of 22.12.2025, the interstellar comet 3I/ATLAS—only the third confirmed object from beyond our solar system—is already on its way out again. Its closest pass by Earth happened just days ago, and while the comet never came anywhere near “close”

22 December 2025

Astronomy·Comets·Scientific Discoveries·Space Exploration·Space News

Night Sky Today (22.12.2025): Ursid Meteor Shower Peak, Aurora Alert, and the Best Planets to Spot Tonight

The “Night Sky Today” headline for 22.12.2025 is basically a gift-wrapped astronomy combo: the Ursid meteor shower is peaking on the darkest nights of the month, the Moon is only a slim waxing crescent (so it won’t wash out faint

22 December 2025

Astronomy·Meteor Showers·Night Sky

Night Sky Tonight (Dec. 21, 2025): Winter Solstice Stargazing, Ursid Meteor Shower Peak, Jupiter’s Glow — and Interstellar Comet 3I/ATLAS

If you’ve been waiting for a “big” skywatching night, Sunday, December 21, 2025 delivers one of the most atmospheric setups of the year: it’s the December solstice, bringing the longest night and shortest day for the Northern Hemisphere—precisely when a

21 December 2025

Astronomy·Meteor Showers·Night Sky·Stargazing

Comet 3I/ATLAS Today: Latest Updates, Science Highlights, and the Week-Ahead Skywatching Forecast (Dec. 21–28, 2025)

On Sunday, December 21, 2025, the interstellar comet 3I/ATLAS is already on the “goodbye” leg of its once-in-a-lifetime pass through our solar system—two days after its closest approach to Earth. The comet is still observable with amateur gear, but it’s

21 December 2025

Astronomy·Comets·Skywatching·Space News

Night Sky Today (Dec. 20, 2025): New Moon Darkness, Jupiter All Night, Ursid Meteors Next, and Interstellar Comet 3I/ATLAS

Saturday, December 20, 2025 brings one of the most skywatcher-friendly setups of the year: a New Moon has wiped out moonlight, Jupiter is blazing in the evening sky and staying up late, the Ursid meteor shower is building toward its

20 December 2025

Astronomy·Comets·Meteor Showers·Night Sky

Comet 3I/ATLAS Today (Dec. 20, 2025): Europa Clipper’s UV Surprise, Parker Solar Probe Images, and the Latest Forecast

December 20, 2025 — The rare interstellar visitor known as Comet 3I/ATLAS is now past its closest approach to Earth and heading back out toward the outer solar system. But “past” doesn’t mean “gone.” Today’s updates include a new research

20 December 2025

Astronomy·Comets·Science News·Space Exploration

Night Sky Tonight (December 19, 2025): How to See Interstellar Comet 3I/ATLAS, Catch New Moon Darkness, and Get Ready for the Ursid Meteor Shower

Friday, December 19, 2025 brings a rare “headline night” for skywatchers: an interstellar comet is making its closest pass by Earth, the Moon is slipping into (or extremely near) a New Moon phase that darkens the sky, and the year’s

19 December 2025

Astronomy·Comets·Meteor Showers·Night Sky

Comet 3I/ATLAS Today (Dec. 19, 2025): Closest Earth Flyby, New NASA/ESA Updates, and How to Watch Live

In the early hours of Friday, December 19, 2025, an icy visitor from beyond our Solar System swept through our cosmic neighborhood—not close enough to scare anyone, but close enough to thrill astronomers. Comet 3I/ATLAS (also known by its formal designation C/2025 N1

19 December 2025

Astronomy·Comets·Skywatching·Space News

Night Sky Tonight (Dec. 18, 2025): Watch Interstellar Comet 3I/ATLAS Live, Plus Moon–Mercury Dawn Pairing, Jupiter and Aurora Chances

Dec. 18, 2025 — If you’re planning to look up tonight, the sky has a rare mix of “big news” and easy wins. The headline event is an interstellar visitor—Comet 3I/ATLAS—making its closest pass by Earth (and getting a free livestream).

18 December 2025

Astronomy·Comets·Night Sky·Stargazing

Astronomy News 18 December 2025 - 24 December 2025