Sunday, August 24, 2014
NIST-F1 contributes to the international group of atomic clocks that define Coordinated Universal Time (UTC), the official world time. Because NIST-F1 is among the most accurate clocks in the world, it makes UTC more accurate than ever before. (Credit: Time and Frequency Division of NIST’s PML)
Artist’s conception of the atmosphere of an Earth-like planet displaying a brownish haze as the result of widespread pollution. (Credit: Christine Pulliam/Harvard-Smithsonian Center for Astrophysics)
This new NASA/ESA Hubble Space Telescope image shows the globular cluster IC 4499. A cosmic archaeological dig has unfolded within a giant ball of stars some 55,000 light-years away. (Credit: NASA)
Top: A typical set-up for squeezing injection in the first demonstrations of squeezing at
GEO600 and LIGO, both using DC readout [36,37]. Bottom: Proposed design for future detectors. This design features an in-vacuum OPO. The remainder of the squeezed light source remains outside of vacuum. (Credit: E. Oelker, L. Barsotti, S. Dwyer, D. Sigg, and N. Mavalvala)
What’s that dot on the Sun? If you look closely, it is almost perfectly round. The dot is the result of an unusual type of solar eclipse that occurred in 2006. Usually it is the Earth’s Moon that eclipses the Sun. This time, the planet Mercury took a turn.
(Credit: D. Cortner, NASA, K. Schmidt)
“Maybe we will see how galaxies are magnetically connected to intergalactic space. This is a key experiment in preparation for the planned Square Kilometre Array (SKA) that should tell us how cosmic magnetic fields are generated,” says Rainer Beck, lead astronomer with the Max Planck Institute.
Researchers have developed a flexible structure that can sense ambient conditions and adjust its color to match them. At the moment, it only works in black and white. (Credit: PNAS, Timmer)