The natural brightness of the night sky

A recent study analyzes data collected at 44 of the darkest places in the world, including the Canary Island Observatories, to develop the first complete reference method to measure the natural brightness of the night sky ...

Digitizing and replicating the world of materials

Is it possible to digitally replicate the way light shines off silk, the kaleidoscope of colors on butterfly wings, or the structure of fabrics, plastics, and stones? A team of researchers at EPFL's Realistic Graphics Lab, ...

Airborne campaign preparing to probe pollution-climate link

(Phys.org) —The floor of a NASA hangar and an adjacent laboratory in Southern California's high desert have been in constant motion this month as scientists prepare their instruments for installation on two of the agency's ...

Firestation: Preparing to study lightning

(Phys.org)—An experiment to study the effects of lightning flashes on Earth's atmosphere has taken its first steps on its journey to space. The Firestation experiment has undergone numerous tests to make sure it's ready ...

Making a spectacle of star formation in Orion

(PhysOrg.com) -- Looking like a pair of eyeglasses only a rock star would wear, this nebula brings into focus a murky region of star formation. NASA's Spitzer Space Telescope exposes the depths of this dusty nebula with its ...

SOFIA successfully observes challenging Pluto occultation

(PhysOrg.com) -- On June 23, NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) observed the dwarf planet Pluto as it passed in front of a distant star. This event, known as an "occultation," allowed scientific ...

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Photometer

In its widest sense, a photometer is an instrument for measuring light intensity or optical properties of solutions or surfaces. Photometers are used to measure:

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