The yellow arrow marks the superluminous supernova DES15E2mlf in this false-color image of the surrounding field. North is up and east is left. This image was observed with the Dark Energy Camera (DECam) gri-band filters mounted on the Blanco 4-meter telescope on Dec. 28, 2015, around the time when the supernova reached its peak luminosity. Credit: Observers: D. Gerdes and S. Jouvel

At a distance of 10 billion light years, a supernova detected by the Dark Energy Survey team is one of the most distant ever discovered and confirmed. The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova that astronomers say is one of the most distant ever discovered...

The yellow arrow marks the superluminous supernova DES15E2mlf in this false-color image of the surrounding field. North is up and east is left. This image was observed with the Dark Energy Camera (DECam) gri-band filters mounted on the Blanco 4-meter telescope on Dec. 28, 2015, around the time when the supernova reached its peak luminosity. Credit: Observers: D. Gerdes and S. Jouvel

At a distance of 10 billion light years, a supernova detected by the Dark Energy Survey team is one of the most distant ever discovered and confirmed. The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova that astronomers say is one of the most distant ever discovered...

In the lead-up to a total solar eclipse, most of the attention is on the sun, but Earth’s moon also has a starring role. Credit: NASA’s Goddard Space flight Center/SVS

In the lead-up to a total solar eclipse, most of the attention is on the sun, but Earth’s moon also has a starring role. “A total eclipse is a dance with three partners: the moon, the sun and Earth,” said Richard Vondrak, a lunar scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “It can only happen when there is an exquisite alignment of the moon and the sun in our sky.”

During this type of eclipse, the moon completely hides the face of the sun for a few minutes, offering a rare opportunity to glimpse the pearly white halo of the solar corona, or faint outer atmosphere...

Subjective vs Objective Grading of Floater Resolution at 6 Months Using a 5-Level Qualitative Scale

Patients reported improvement in symptoms of eye floaters after treatment with a laser, according to a study published by JAMA Ophthalmology. Floaters become more prevalent with age and although most patients grow accustomed to them, many find them bothersome, and they can worsen visual quality. Three management options exist for floaters: patient education and observation; surgery; and the laser procedure, YAG vitreolysis, of which there are limited published studies on its effectiveness for treating floaters.

Chirag P. Shah, M.D., M.P.H., and Jeffrey S. Heier, M.D...