Powered by hydrogen gas, fuel cell vehicles produce only water as a tailpipe emission.
Hydrogen cars were heralded as an avenue towards universal green motoring, but progress has stalled in recent years.
NASA’s Orbiting Carbon Observatory (OCO-2) satellite can make precise measurements of global atmospheric carbon dioxide (CO2) from space.
Tracking CO2 emissions with satellites can help to support emission reduction efforts under the Paris Agreement.
The space shuttle Atlantis was one of the last major launches aboard a NASA rocket.
After its fourth delay, the Artemis 1 launch is now scheduled for Nov. 16, 2022. NASA has a history of missing launch deadlines, but the private sector is slowly making launches more reliable.
Concept illustration for research robots that could bring samples of Mars rocks to Earth-based labs.
Sophisticated equipment on the Perseverance rover is helping answer some of the many questions researchers have about Mars’ geology over time.
Astronomers have been looking for radio waves sent by a distant civilization for more than 60 years.
Rytis Bernotas/iStock via Getty Images
The technology of an advanced alien civilization is likely to produce many signs that could be detected across the vastness of space. Two astronomers explain the search for technosignatures.
There are fewer women than men astronauts involved in research, training and missions.
If history is any indication, space exploration will need to contend with and prevent sexual harassment and assault during missions and training.
The Double Asteroid Redirection Test successfully changed the orbit of the small moonlet Dimorphos.
NASA/Johns Hopkins APL
The Double Asteroid Redirection Test successfully showed that it is possible to crash a spacecraft into a small asteroid and change its orbit. This technique could save Earth from asteroids in the future.
The moon is currently moving 3.8 cm away from the Earth every year.
Scientists have uncovered the long-term history of our receding moon. And it’s not from studying the moon itself, but from reading signals in ancient layers of rock on Earth.
In some African countries, astronomical research is quite developed.
The atmosphere protects life on Earth from the effects of the Sun’s radiation, but space travel is a different matter.
As the potential for space travel increases, it is necessary to develop methods to protect astronauts from environmental stresses in space. Studying the DNA of baker’s yeast may provide some clues.
Didymos (bottom right) and its smaller moonlet Dimorphos (center) were the targets of the Double Asteroid Redirection Test.
NASA/Johns Hopkins APL
The Double Asteroid Redirection Test successfully showed that it is possible to crash a spacecraft into a small asteroid. Whether the approach could save Earth from a future threat remains to be seen.
The Double Asteroid Redirection Test is the first planetary defense experiment ever attempted.
Crashing the 1,340-pound DART probe into the small moonlet orbiting the asteroid Didymos should redirect its trajectory – and could be a model for how to save Earth in the future.
Astronomers think the most likely place to find life in the galaxy is on super-Earths, like Kepler-69c, seen in this artist’s rendering.
Newly discovered super-Earths add to the list of planets around other stars that offer the best chance of finding life. An astronomer explains what makes these super-Earths such excellent candidates.
NASA / Joel Kowsky
Lunar mining and geopolitical squabbles are set to play key roles in humanity’s return to the Moon.
NASA is going back to the Moon.
When the Orion Crew Capsule orbits the Moon there will be no one on board. But the mission will mark a key step in bringing humans back to Earth’s dusty sidekick.
Making territorial claims in space is illegal under international law.
The era of lunar resource use is quickly approaching. But with legal and practical issues still looming, nations are starting to think about sustainable ways to mine and protect the Moon.
Solutions to Einstein’s famous equations back in the 20th century describe ‘wormholes,’ or tunnels through space-time.
Mark Garlick/Science Photo Library via GettyImages
An astrophysicist explains what wormholes are and how these theoretical space-time tunnels have popped up in the solutions to a set of decadesold equations.
Space exploration is becoming a more feasible reality, prompting a need for international cooperation.
A new publication clarifies how existing legal frameworks apply to space exploration and development. The McGill Manual also highlights the catastrophic implications of conflict in space.
Listening for events like black hole collisions is important in astronomy research – and the technology is only getting better.
Private companies have launched dozens of imaging satellites – like the two small boxes in the middle of the photo – into orbit in recent years.
Private satellite companies have boomed in recent years, and many experts have wondered what role they would play in a conflict. They have proved to be invaluable to Ukraine in recent months.