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Hubble sees a supernova explosion called SN 2004dg on the edge of NGC 5806, a spiral galaxy in the constellation Virgo. It lies around 80 million light years from Earth.

http://www.nasa.gov/topics/universe/index.html

Real-time imaging of a rodent brain shows that nanoparticles coated with polyethylene-glycol (PEG) (green) penetrate farther within the brain than particles without the PEG coating (red)

Particularly tested for carbon based substrates such as carbon nanocabon tubes, the proposed method has enabled the synthesis of platinum-cobalt nanoparticles featuring lower dimensions, narrower size distributions and higher stabilities compared to the conventional methods.

In 1604, a new star appeared in the night sky that was much brighter than Jupiter and dimmed over several weeks. This event was witnessed by sky watchers including the famous astronomer Johannes Kepler. Centuries later, the debris from this exploded star is known as the Kepler supernova remnant.

Observations by NASA's Mars Reconnaissance Orbiter have detected carbon-dioxide snow clouds on Mars and evidence of carbon-dioxide snow falling to the surface.

A hypothetical planet is depicted here moving through the habitable zone and then further out into a long, cold winter.

A tiger’s eyes glow during the night on the same foot paths and roads humans use during the day to collect wood and grasses.

An example of bioluminescence: light emitted from a deep sea brittle star

This view of the lower front and underbelly areas of NASA's Mars rover Curiosity combines nine images taken by the rover's Mars Hand Lens Imager (MAHLI) during the 34th Martian day, or sol, of Curiosity's work on Mars (Sept. 9, 2012).

Laser light is emitted from the end of a cadmium sulfide nanowire.