How an ancient collision with another galaxy transformed the Milky Way
The Hubble Space Telescope has discovered evidence that our galaxy experienced a significant collision and merger with a…
The JWST Little Red Dots Could Be ‘Black Hole Stars’
The early Universe’s Little Red Dots (LRD) could be the JWST’s strangest discovery. LRDs are small, red, astronomical…
US Space Force Payload Lifts Off on Japanese Satellite
Audio of this article is brought to you by the Air & Space Forces Association, honoring and supporting…
Hubble Solves Merger Mystery From Milky Way’s Early Years
About 12 billion years ago, a dwarf galaxy known as LKH collided with a young Milky Way and…
JWST found water-altered clay minerals on two of Neptune’s tiny inner moons and its rings that probably formed deep inside much larger icy worlds — compelling evidence that today’s moons may be rubble from Neptune’s original satellite system, destroyed when the captured moon Triton tore through it billions of years ago.
The clay is the clue. Larissa and Galatea are two small, dark moons tucked close to Neptune, where…
US Space Force, Japan launch sensor to bolster space surveillance above Indo-Pacific
A U.S. Space Force Space Domain Awareness payload launched successfully Aug. 10 aboard Japan’s Quasi-Zenith Satellite 7, or…
On this day in space! Aug. 17, 1877: Asaph Hall Discovers the Martian moon Phobos
On Aug. 17, 1877, American astronomer Asaph Hall discovered Mars’s moon Phobos. Moons of Mars: Amazing Photos of…
L3Harris names space sector leader Sam Mehta CEO after Kubasik steps down
WASHINGTON — L3Harris Technologies named Sam Mehta its new chief executive, elevating the head of its space business…
Satellite operators emphasize launch deals in a constrained market
WASHINGTON — Amid a constrained launch market, satellite operators are increasingly emphasizing to investors and customers that they…
What Can We Actually Find on an Exoplanet? Part 1: The Atmospheric Fingerprint
In 1990, the Voyager 1 spacecraft, then six billion kilometers from Earth and destined to become humanity’s most…
At the start of 2019, fewer than 2,000 active satellites circled Earth. By June 2026 there were 15,711 — and nearly two out of every three belonged to a single constellation: SpaceX’s Starlink.
Look Up’s quarterly space index, released on 2 June 2026, counted 15,711 active satellites in Earth orbit. It…
Billionaire founder agrees with Elon Musk, Sam Altman and Jeff Bezos: We will work in space
Some of the world’s most powerful tech billionaires think your next job posting could come from another planet.…