sun

CME and post-coronal loops on Sun

An active region that had just rotated into view blasted out a coronal mass ejection, which was immediately followed by a bright series of post-coronal loops seeking to reorganize that region’s magnetic field (April 19,…


Solar Probe Plus going for a sun tan

Every so often the sun emits an explosive burst of charged particles that makes its way to Earth and often wreaks havoc on power grids, aircraft and satellite systems. When clouds of high-speed charged particles…


Let’s look a̶t̶ with the Sun

Astronomers use several techniques to find exoplanets, including the so-called “gravitational microlensing” method. The light from a faraway star and its exoplanet is bent around another star located midway between Earth and the distant star/exoplanet,…


A year of Sun

This montage of 366 images shows our Sun through the eyes of ESA’s Proba-2 satellite, as seen each day in 2016. The satellite’s SWAP camera works at extreme ultraviolet wavelengths to capture the hot turbulent…


Better (solar) weather predictions

Excitement is building over European plans to launch a new space-weather satellite that would drastically improve forecasts of how solar storms will affect Earth. The European Space Agency (ESA) hopes to send the probe to…


Amazing Analemmas

The analemma, the 8-figure the Sun seems to make in the year in the sky, is caused by two effects: the tilting of the Earth axis (making the seasons) and the elliptical orbit of the…


Supersonic Sun

Ubiquitous supersonic (150 km/s – 350 km/s) events in the solar chromosphere have been discovered fortuitously by CLASP (Chromospheric Lyman Alpha SpectroPolarimeter) which was carried up above the atmosphere by a sounding rocket on September…