The term ‘habitable zone’ is a broad definition that serves a purpose in our age of exoplanet discovery. But the more we learn about exoplanets, the more we need a more nuanced definition of habitable.
Space News & Blog Articles
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Former U.S. Navy Seal Jonny Kim will be 1st Korean-American astronaut on ISS in March 2025
U.S. Navy lieutenant and NASA astronaut Jonny Kim will board a Russian Soyuz spacecraft to fly to the ISS for an eight-month mission in 2025.
What were the Bell Riots in 'Star Trek: Deep Space Nine's greatest time travel episode?
As history catches up with a pivotal moment in the "Star Trek" timeline, we look back at the events of "Past Tense," which took place on Aug. 30, 2024.
NASA bumps two astronauts from SpaceX flight to make room for Starliner crew
The crew of NASA’s SpaceX Crew-9 mission to the International Space Station poses for a group photo at SpaceX headquarters in Hawthorne, California. Image: SpaceX.
NASA has bumped two female astronauts. including the commander, from the next SpaceX crew rotation flight to the international space station, freeing up two seats to give the agency’s Starliner astronauts a ride home next February.
The best 50s sci-fi movies
Explore the greatest sci-fi titles that emerged amidst rock, roll, and the Golden Age in our round-up of the best 50s sci-fi movies.
NASA gives Intuitive Machines $117 million for 2027 mission to moon's south pole
Intuitive Machines, which aced the first-ever private moon landing earlier this year, just scored a $117 million NASA contract for a 2027 mission to the lunar south pole.
A New Test Proves How to Make the Event Horizon Telescope Even Better
Want a clear view of a supermassive black hole’s environment? It’s an incredible observational challenge. The extreme gravity bends light as it passes through and blurs the details of the event horizon, the region closest to the black hole. Astronomers using the Event Horizon Telescope (EHT) just conducted test observations aimed at “deblurring” that view.
NASA's Perseverance rover begins ambitious ascent up a Mars crater rim
NASA's Perseverance Mars rover has started off on its most ambitious ascent yet to the rim of Jezero Crater.
NASA cuts 2 astronauts from SpaceX Crew-9 mission to make room for Boeing Starliner crew
NASA's Crew-9 mission now has only 2 astronauts instead of 4. The last-minute change gives room to return 2 astronauts on the ISS who needed a new ride home.
Boeing Starliner astronauts will spend at least 240 days stuck in space — is that a new record?
NASA astronauts Butch Wilmore and Sunita Williams will spend at least eight consecutive months aboard the International Space Station as their Boeing Starliner spacecraft returns to Earth empty. Is their extended spaceflight record-setting?
ESA Cluster Satellite to Reenter in Early September
The first of a set of groundbreaking Cluster satellites is set for a controlled reentry next week.
'Doomed' comet Tsuchinshan-ATLAS survives brush with sun — may be visible to naked eye this fall
We provide the latest details on this comet, which might (or might not!) blossom into a bright naked-eye object in our October evening skies.
Early galaxies weren't mystifyingly massive after all, James Webb Space Telescope finds
Black holes may be behind why the newborn universe appeared to possess more huge galaxies than scientists could explain, a new study finds.
How AI is revealing the universe's original 'settings'
Astronomers used artificial intelligence to calculate the five cosmological parameters that describe the entire universe in computer simulations with unprecedented precision.
This Week's Sky at a Glance, August 30 – September 8
Low in twilight, climbing Venus and descending Spica prepare to pass each other. After dark Vega crosses the zenith, and Scorpius beds down. Mercury shines at dawn.
New Limits on Dark Matter
As it’s name suggests, dark matter is dark! That means it’s largely invisible to us and only detectable through its interaction with gravity. One of the leading theories to explain the stuff that makes up the majority of the matter in the Universe are WIMPs, Weakly Interacting Massive Particles. They are just theories though and none have been detected. An exciting new experiment called LUX-ZEPLIN has just completed 280 days of collecting data but still, no WIMPs have been detected above 9 Gev/c2. There are plans though to narrow the search.
Sentinel-2C: ready for liftoff
Video: 00:02:32
Sentinel-2C is ready for launch! The new satellite will soon join its Copernicus Sentinel-2 family in orbit – where it will continue to provide detailed views of Earth’s land and coastal waters.
Discover where space begins: the guide to ESA’s establishments
Discover where space begins: the guide to ESA’s establishments
European drill and mini lab secure ride to the Moon
ESA's Prospect package, including drill and a miniaturised laboratory, will fly to the Moon’s South Polar region in search of volatiles, including water ice, as part of NASA’s Commercial Lunar Payload Services initiative.
Remember those Impossible Galaxies Found by JWST? It Turns Out They Were Possible After All
When the James Webb Space Telescope provided astronomers with a glimpse of the earliest galaxies in the Universe, there was some understandable confusion. Given that these galaxies existed during “Cosmic Dawn,” less than one billion years after the Big Bang, they seemed “impossibly large” for their age. According to the most widely accepted cosmological model—the Lambda Cold Dark Matter (LCDM) model—the first galaxies in the Universe did not have enough time to become so massive and should have been more modestly sized.
