The European Space Agency announced a team of seven astronauts on Wednesday to train for NASA's Artemis mission to the moon—but only one will have the chance to become the first European to walk on the lunar surface.

The candidates—France's Thomas Pesquet, Britain's Tim Peake, Germany's Alexander Gerst and Matthias Maurer, Italy's Luca Parmitano and Samantha Cristoforetti, and Denmark's Andreas Mogensen—have all completed at least one mission on board the International Space Station.

Between them, the team has the equivalent of 4.5 years in orbit and 98 hours of spacewalking, ESA communications head Philippe Willekens told journalists at the International Astronautical Congress in Paris.

Three of the astronauts will be selected to go to the Lunar Gateway, a planned station that will orbit the moon.

But only one will set foot on the moon by the end of the decade.

The International Space Station welcomed three new residents Wednesday following a smooth Russian launch.

The Soyuz capsule rocketed into orbit from Kazakhstan and, just three hours later, pulled up at the space station.

A US astronaut and two Russian cosmonauts are set to blast off to the International Space Station Wednesday on a Russian-operated flight despite soaring tensions between Moscow and Washington over Russia's invasion of Ukraine.

NASA's Frank Rubio and Russia's Sergey Prokopyev and Dmitry Petelin are scheduled to take off from the Russia-leased Baikonur cosmodrome in Kazakhstan at 1354 GMT, according to Russian space agency Roscosmos.

Rubio will become the first US astronaut to travel to the ISS on a Russian Soyuz rocket since President Vladimir Putin sent troops into pro-Western Ukraine on February 24.

In response, Western capitals including Washington have hit Moscow with unprecedented sanctions and bilateral ties have sunk to new lows.

People have been exploring the surface of Mars for over 50 years. According to the United Nations Office for Outer Space Affairs, nations have sent 18 human-made objects to Mars over 14 separate missions. Many of these missions are still ongoing, but over the decades of Martian exploration, humankind has left behind many pieces of debris on the planet's surface.

I am a postdoctoral research fellow who studies ways to track Mars and Moon rovers. In mid-August 2022, NASA confirmed that the Mars rover Perseverance had spotted a piece of trash jettisoned during its landing, this time a tangled mess of netting. And this is not the first time scientists have found trash on Mars. That's because there is a lot there.