sunspots are regions on the sun's photosphere that appear darker than surrounding areas because they are cooler, usually by one or two thousand degrees Celsius. These spots are temporary phenomena caused by magnetic activity ...
Astronomy
Dec 18, 2017
0
27
The earliest definitions of time and time-interval quantities were based on observed astronomical phenomena, such as apparent solar or lunar time, and as such, time as measured by clocks, and frequency, as measured by devices ...
General Physics
Mar 22, 2016
0
131
(Phys.org)—On the evening of 13 and the morning of 14 December, skywatchers across the world will be looking up as the Geminid meteor shower reaches its peak, in potentially one of the best night sky events of the year.
Space Exploration
Dec 13, 2012
0
1
A research team of the Department of Physics, Keio University, has discovered a molecular cloud with a peculiar helical structure by observation with the NRO 45m Telescope at Nobeyama Radio Observatory, National Astronomical ...
Astronomy
Sep 10, 2012
26
0
The Center for Computational Astrophysics (CfCA) of the National Astronomical Observatory of Japan upgraded the supercomputer Cray XC30 system "ATERUI". By introducing state-of-the-art CPUs, the theoretical peak performance ...
Hardware
Nov 27, 2014
2
0
