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A refractor telescope, which uses an objective lens to concentrate light into the eyepiece at the viewing end, gives better images of the planets and Moon. A reflector telescope, on the other hand, which uses mirrors to bounce incoming light through to a eyepiece lens, will be great at picking out dimmer objects such as galaxies or nebulae.
After he completed his first reflecting telescope in 1668, Isaac Newton found that he could observe the four Galilean moons of Jupiter – Europa, Ganymede, Io and Callisto – as well as the crescent phase of the second planet from the Sun, Venus. Newton’s intention wasn’t to discover new objects with his telescope.
Venus is wrapped in thick clouds of carbon dioxide that make it impossible to see down to its rocky surface. Even spacecraft in orbit around Venus have to resort to radar to penetrate the clouds and detect the surface terrain, and NASA’s Magellan space probe did this successfully in the 199
An apochromatic telescope has a multi-lens setup to eliminate chromatic aberration when stargazing. Chromatic aberration is caused by the difference in wavelength of various colours of light. In a single-lens setup, blue light is focussed closer to the lens and it has a shorter focal length. Red light is focussed further away from the lens.
The brilliant flash of an exploding star’s shockwave – what astronomers call the “shock breakout” – has been captured for the first time in the optical wavelength or visible light by NASA’s planet-hunter, the Kepler space telescope.
The telescope includes 2 Explorer II 1.25” a 17” and a 6”. This proves that the Orion StarBlast is a great and well-equipped telescope that anybody passionate about astronomy can use. 3. Celestron PowerSeeker 76 AZ. This Celestron telescope is another great device for novice astronomers.
For a number of reasons, one of which is that space still isn’t cold enough! Certain satellites often need cooling in space to work properly, the Herschel Space Telescope (pictured above) is a prime example of this. This telescope detects infrared radiation. This type of radiation is associated with heat so any sources of heat can be detected.
An artist’s impression of the KM3NeT telescope as it sits at the bottom of the Mediterranean sea. Image credit: Edward Berbee/Nikhef/KM2NeT Curtin University researchers in Perth, Australia, are part of an international project that will use a huge underwater neutrino telescope at the bottom of the Mediterranean Sea to help explain some of ...
By pushing NASA’s Hubble Space Telescope to its limits, an international team of astronomers has shattered the cosmic distance record by measuring the farthest galaxy ever seen in the universe. This surprisingly bright, infant galaxy, named GN-z11, is seen as it was 13.4 billion years in the past, just 400 million years after the Big Bang.
High in the Atacama Desert of northern Chile, construction is nearing completion on what will be the biggest telescope array the world has ever seen. Composed of 66 separate radio telescopes, the Atacama Large Millimeter Array (ALMA) is a mammoth project that will allow us to observe the universe with vision ten times sharper than the Hubble ...