Astronauts explain why no human has visited the moon in 50 years — and the reasons are depressing
The last time a human visited the moon was in December 1972 during NASA's Apollo 17 mission. Since then, there have been many foiled plans to go back.
Dave Mosher
Senior Space Correspondent (former)
There's a mysterious, abandoned island less than a mile from Manhattan and almost no one is allowed to visit — here's what it's like
North Brother Island, a 22-acre piece of land in New York City, has a long history that's checkered with disease, death, and decay.
8 men and women once sealed themselves inside this enormous fake Mars colony for 2 years. Here's what it's like today.
Biosphere 2 was an ambitious 1990s experiment to simulate a self-sustaining Mars colony in the Arizona desert. A new documentary details the project.
How large asteroids must be to destroy a city, state, country, or the planet
How big of an asteroid does it take to damage cities, states, countries, and the planet? On the fourth-annual World Asteroid Day (Saturday, June 30), we take a look at estimates from NASA, Purdue University's "Impact Earth" simulator, and other sources.
The 2023 spring equinox is here — here's what it is and how it works
The spring equinox takes place on March 20, 2023. Here's how Earth and the sun align to cause the celestial event, and what it means.
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Here's every key spacesuit NASA astronauts have worn since the 1960s — and the new moon suit it just unveiled
NASA unveiled new spacesuits that will be used for the Artemis III mission, which will put astronauts back on the moon for the first time in 50 years.
A terrifying animation shows how 1 'tactical' nuclear weapon could trigger a US-Russia war that kills 34 million people in 5 hours
"Plan A" is a hypothetical yet eerily plausible scenario imagined by nuclear weapons experts. It shows 91 million deaths and injuries in hours.
What Elon Musk's 42,000 Starlink satellites could do for — and to — planet Earth
SpaceX, Amazon, OneWeb and others want to bring high-speed internet to every part of the world. But experts worry this could come at a cost for space exploration.
Watch video of NASA test-firing the world's most powerful rocket stage
Firing up Space Launch System's core stage is a crucial step toward flying astronauts to the moon for the first time in more than 50 years.
Jeff Bezos and Blue Origin launched a rocket that could make way for space-tourism flights this year
The 14th launch of a New Shepard rocket will send a space capsule past the edge of space to test the system ahead of its first passenger flights.
A private astronaut explains why his next flight — likely with Tom Cruise — is 'setting the bar for commercial human spaceflight forever'
The former NASA astronaut Michael López-Alegría will command Axiom Space's historic all-private mission to orbit aboard SpaceX's Crew Dragon ship.
A private astronaut explains how Axiom plans to replace the International Space Station and potentially save NASA billions per year
Michael López-Alegría, a former NASA astronaut, is working for aerospace startup Axiom to help replace the $150 billion International Space Station.
MONEY FOR MARS: Inside SpaceX's quest to make Starlink the world's top off-planet internet business
SpaceX founder Elon Musk is banking on thousands of low-flying, internet-beaming Starlink satellites to help fund his vision of Martian cities.
Viasat says Elon Musk criticized an executive 'not involved' in the company's FCC petition against Starlink
Rival satellite company Viasat drew Musk's ire by asking the Federal Communications Commission to perform a lengthy environmental review of Starlink.
Here's how many millions of users Starlink may need to break even if it loses $2,000 for every satellite dish it sells, according to experts
Elon Musk hopes Starlink will net the company $30 billion to $50 billion a year. He'll need millions of customers to make that a reality.
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SpaceX may shell out billions to outsource Starlink satellite-dish production, an industry insider says — and lose up to $2,000 on each one it sells
The Elon Musk-founded company appears to have contracted a Swiss electronics giant to build user terminals for about $2,400 a pop.
The FAA released SpaceX's rough plan to fly Starship rockets to orbit from Texas, and the agency wants public input on it
Before Elon Musk and SpaceX rocket Starship-Super Heavy to orbit from Boca Chica, the FAA needs the company to finish a new environmental assessment.
Meet the astronaut who may fly Tom Cruise to orbit on the first all-private space mission with SpaceX's help
Axiom Space commander Michael López-Alegría, a former NASA astronaut, may pilot three tourists to the ISS in 2021 aboard SpaceX's Crew Dragon ship.
Amazon unveiled a 'breakthrough' Kuiper satellite-internet dish antenna that's 1/3 the size of SpaceX's Starlink device
The high-tech antenna, called a consumer terminal, is designed to link Amazon Kuiper subscribers to internet-beaming satellites flying overheard.
Block-by-block maps reveal where SpaceX must offer Starlink satellite internet to 642,000 homes and businesses at competitive prices
Over the next 10 years, SpaceX plans to roll out Starlink to more than half a million subscribers as part of the FCC's Rural Digital Opportunity Fund.