Telescopes collect light and other forms of energy from stars and galaxies. The energy travels in wavelengths, but Earth’s atmosphere stops some of these from reaching our planet’s surface. Telescopes
located in space are able to collect the full range of wavelengths and give us a more complete view of the universe. They can also be used 24 hours a day.
Collecting energy
Space telescopes work
in a similar way to Earth
telescopes. These use a mirror
to collect wavelengths of
light, which are brought
to a focus to form an image
of the object in view.
Space telescopes work around the
clock to collect information in a range of
wavelengths. Though they image objects
nearby, these telescopes usually peer
into deep space to give us extraordinary
views of distant stars and galaxies.
News:
Space telescopes
*The Hubble Space Telescope works around 348 miles (560 km) above Earth. It started work collecting infrared, optical, and ultraviolet energy in 1990.
*The Solar Dynamics Observatory launched in February 2010 and will observe the Sun for five years.
*The Fermi Gamma Ray Telescope started work above Earth in mid-2008. It is studying gamma rays from explosions in distant galaxies.
*Launched into space in 2009, Planck is investigating the heat that remains from the Big Bang.
|
No comments:
Post a Comment