The main function of a telescope spectrograph is to separate light into its component colours (or wavelengths) to reveal information about the chemical content, temperature and motion of distant ...

Astronomers have observed a Sun-like star dim dramatically for nearly nine months after being obscured by a vast cloud of gas and dust. A huge cloud filled with vaporized metals has been spotted ...

The Gemini South telescope’s newest science instrument — GHOST, the Gemini High-resolution Optical SpecTrograph — achieved first light by making exquisite observations of HD 222925, a remarkably ...

The most advanced optical spectrograph in the world begins a two-week journey today from the University of California, Santa Cruz, where it was built, to the summit of Mauna Kea in Hawaii, where it ...