Wednesday June 25, 2014
NASA’s Mars Curiosity Rover captures a selfie to mark a full Martian year — 687 Earth days — spent exploring the Red Planet. (Credit: NASA/JPL-Caltech/MSSS)
Artist impression of a white dwarf star in orbit with pulsar PSR J2222-0137. It may be the coolest and dimmest white dwarf ever identified. (Credit: B. Saxton NRAO/AUI/NSF)
Lawrence Livermore physicist Hui Chen sets up targets for an experiment using petawatt laser technology at the Jupiter Laser Facility.
One of the bulbs Thomas Alva Edison used to discover thermionic emission (the Edison Effect) in 1884. Edison found when he connected an ammeter between the filament and the auxiliary electrode, a current would flow, passing through the evacuated space of the bulb from filament to electrode. This current was later found to consist of electrons.
This image shows professor Donhee Ham and his student Hosang Yoon are in the laboratory at the Harvard School of Engineering and Applied Sciences. (Credit: Eliza Grinnell, Harvard SEAS.)
Richard Feynman – Physicist, Philosopher (Image: Washington University)