Hawaii or Spain? Telescope experts say it may not matter

When starlight from billions of years ago zips across the universe and finally comes into focus on Earth, astronomers want their telescopes to be in the best locations possible to see what's out there.

Largest data set in SETI history released to the public

Breakthrough Listen—the astronomical program searching for signs of intelligent life in the Universe—has submitted two publications to leading astrophysics journals, describing the analysis of its first three years of ...

Quasar jets confuse orbital telescope

Astrophysicists from the Moscow Institute of Physics and Technology, the Lebedev Physical Institute of the Russian Academy of Sciences (LPI RAS), and NASA have found an error in the coordinates of active galactic nuclei measured ...

Radio telescope gets upgrade at Brookhaven lab

A radio telescope at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory has received a significant upgrade, advancing from one dish to four. The upgrades are part of the Laboratory's ongoing effort to test ...

Euclid progresses with primary mirror delivery

In order to observe billions of faint galaxies and investigate the nature of the dark Universe, ESA's pioneering Euclid mission will require state-of-the-art optics. The first optical element to be delivered, the telescope's ...

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Optical telescope

An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for making a photograph, or collecting data through electronic image sensors.

There are three primary types of optical telescope: Refractors (Dioptrics) which use lenses, Reflectors (Catoptrics) which use mirrors, and Combined Lens-Mirror Systems (Catadioptrics) which use lenses and mirrors in combination; for example, the Maksutov telescope and the Schmidt camera.

This text uses material from Wikipedia, licensed under CC BY-SA