The Apollo 11 moonwalker said it is not feasible to support both ambitions.
Chinese space programme appears far more ambitious than its Nasa equivalent.
Exoplanet HAT-P-26b likely formed close to its star.
The Crab Nebula is located in the Taurus constellation.
Given the hazardous landing conditions on Mars, this will double the chances of a successful touchdown on the red planet.
Lava lake Loki Patera on Io is the most volcanic site in the entire solar system.
The magnificent image depicts an azure blue sky from space with white clouds floating around.
Falcon Heavy development continues ahead of first flight in 2017 and planned trip to Mars in 2020.
Molecular oxygen surrounding comet 67P/Churyumov-Gerasimenko has long puzzled scientists.
Why has the X-37B has been in low Earth orbit for so long?
This is the first close-up study of sand dunes outside of Earth.
Russia accounts for more space debris than any other country.
SpaceX gave the Senate Committee on Commerce, Science and Technology an update on its ambitious plans.
A new mathematical model uses Einstein theory of general relativity to describe a viable time machine.
It is a large anomaly in the biggest kind of gravity-bound structure there is in the universe.
Cassini's next dive between Saturn and its innermost rings is scheduled for 2 May.
Bricks made from Mars-like soil are stronger than reinforced concrete.
New spacesuits will not be ready before the International Space Station's closure in 2024.
Scientists are trying to learn more about the Sun's activity to prepare for the impact of its eruptions on Earth.
China has recently ramped up its space programme and plans to launch a lunar mission in 2018.
The anomaly of the universe's Cold Spot could be explained by a collision with another universe.
Cassini will undertake some cosmic acrobatics as part of its grand finale orbit.
Pulsars usually rotate more slowly as they age, but XB091D is spinning faster.
The president made the surprise announcement while talking live to the International Space Station.
Titan is brighter at twilight that in daylight, according to a new study.
China hopes to have its own crewed space station in orbit by 2022.
Cassini will be first man-made probe to explore within Saturn's rings before self-destructing.
Check out some of the best photos clicked by Nasa's satellites and International Space Station.
Accretion disks that form around young star as nickname 'dusty space hamburger'.
Cosmic alignment of supernova iPTF16geu with gravity lens reveals stunning images.