The comet is only the second confirmed interstellar object to have passed through the solar system.
An astrophysicist told Newsweek the walk "represents years of dedication, study, hard work, and pushing limits and that is truly inspirational."
The collaborative mission will test a technique that could be used to prevent a dangerous space rock from colliding with the Earth in future.
The latest launch was the fifteenth for the Vega rocket since it began operations seven years ago, but the first time one has failed.
Messier 90 belongs to a vast collection of more than 1,200 galaxies known as the Virgo Cluster, which has a diameter of 15 million light-years.
French Guiana is home to Europe's space program. But to residents, the spaceport has come to symbolize something very different: vast economic inequality.
The 52 mile wide crater is filled to the brim with water ice.
The system has the ability to scan the bodies of 2,000 passengers per hour.
The BepiColombo spacecraft will be frozen, toasted and exposed to intense radiation on its way to the planet.
The "unprecedented map" captures the position and brightness of nearly 1.7 billion stars.
As the tides ebb and flow, so does an elusive magnetic signal.
The thruster devours molecules it plucks from the air.
The space instrument COSIMA has collected 35,000 particles of dust from the comet.
"Whatever this object is, I think there's a good chance it may not be a meteor at all."
The rogue space station is expected to crash to Earth in the next few months.
Don't cry too much about Cassini. Upcoming missions are going to Mars, Mercury, the Sun, Europa and several asteroids.
As a triumphant mission to Saturn ends, its lead imaging scientist recalls her favorite photographs and moments.
The Schiaparelli robot probe follows the "heroic failure" of the Beagle 2 in 2003.
The Shiaparelli lander will test technologies for Europe's planned first Mars rover.
In a collaboration with Ars Electronica, the space agency will host an arts and science residency.
NASA are again proving why being an astronaut is amazing
A new crew is en route to the ISS. NASA TV has coverage of the docking and hatch opening.
New magnetic gears - where the parts never touch - developed for space rovers will extend their operational life.
The European Space Agency put the idea forward in hopes of achieving long-term access to the moon
Scientists will decide whether to risk a complex drilling procedure which would enable the Philae probe to examine samples from the surface of the comet before batteries run out