Adjective
relating to any region of outer space outside our solar system
NASA will fly the International Space Station until 2020. It will also begin developing a rocket for deep-space exploration, ventures that will include trips to asteroids and, eventually, Mars.
Adjective
having a force of attraction between particles or bodies with mass or energy
Anything but empty space, a black hole is a great amount of matter packed into a very small area, resulting in a gravitational field so strong that nothing, not even light, can escape.
Two outer planets of the Kepler 62 system may lie in the habitable zone. Their orbits place them both in the “Goldilocks” zone of lukewarm temperatures suitable for liquid water.
If you look to the stars tonight, consider this: No matter how innumerable they may seem, there are far more planets than stars lurking out there in the darkness.
US astronaut Neil Armstrong, the first man to set foot on the Moon, has died at age 82. He was commander of Apollo 11. More than 500 million TV viewers around the world watched its touchdown on the lunar surface.
Adjective
great in number, size, amount, extent, or degree
A new picture helps scientists unravel the mystery of a vast green blob discovered in a galaxy millions of light years away. Part of a streamer of gas stretching around the galaxy, it may be giving birth to new stars.