Show kids the importance of the sky and the atmosphere, which protects the Earth from harmful radiation and keeps the planet at a healthy temperature. Help them make a telescope to explore this ...

Explore these orbiting pioneers and learn what they've discovered. 3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of ...

Interstellar dust clouds and inky stretches of deep space can appear dull to ordinary telescopes. But to a car-size telescope 26 million miles (41.8 million kilometers) from Earth, they are alive ...

They delved into the telescope's guts during long space walks and replaced parts that the original designers never thought they'd need to. Installation of a new power-control unit forced an ...

This story appears in the July 2009 issue of National Geographic magazine. When you start stargazing with a telescope, two experiences typically ensue. First, you are astonished by the view ...

This story appears in the August 2017 issue of National Geographic magazine ... what led astronomer Natasha Hurley-Walker to a radio telescope deep in the outback of Western Australia.

Even that "is sort of a long shot," admits Bruce Macintosh, an adaptive optics expert at Lawrence Livermore National Laboratory, who is carrying out his search at the giant Keck II telescope on ...

Home to the largest telescope of its day, Mount Wilson was the site of Hubble's astronomical triumphs. In 1924 he had used the telescope's then colossal 100-inch (254-centimeter) mirror to confirm ...