\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

Astronomers using the Chandra X-ray Telescope have discovered an "exhaust vent attached to a “chimney” of hot gas blowing away from the center of the Milky Way galaxy," according to the ...

Some of the microscopes on this list are for the very smallest of children, designed to be toys but with working microscope functions. Others are real scientific instruments, ideal for older ...

The James Webb Space Telescope, a collaboration of NASA and its Canadian and European space agency counterparts, has finally captured clear images of these magnificent Neptunian light shows.

The James Webb Space Telescope detected infrared auroras on Neptune for the first time. The auroras are shown in cyan in this enhanced-color image. (Image credit: NASA, ESA, CSA, STScI, Heidi ...

NASA's James Webb Space Telescope (JWST) has unveiled an awe-inspiring celestial spectacle of a spiral galaxy interacting with a plume of dust and gas from a newborn star. NASA said in a statement ...

But such collisions are so rare that enormous volumes of target material are needed to create a neutrino telescope. What’s more, astronomers need to place these instruments deep underground or ...

NASA’s James Webb Space Telescope observed Herbig-Haro 49/50, an outflow from a nearby still-forming star, in high-resolution near- and mid-infrared light. The young star is off to the lower right ...

The Xradia Versa family is the latest generation of 3D X-ray microscopy (XRM) solutions optimized for non-destructive micro tomography. Xradia 510 Versa advances industry and science with a ...

SPHEREx—which stands for Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer—is a NASA mission that will use a wide-field telescope to gather optical ...

Rubin Observatory in Chile. Launched in 2023, the ESA's $1.5 billion Euclid space telescope is equipped with a near-perfect 3-feet 11-inch-wide primary mirror and two instruments: a 600 megapixel ...