Blog

October 18, 2010
SOHO Pick of the Week - 15 October 2010

A Twisting Solar Prominence (SOHO Pick of the Week)

The STEREO (Ahead) spacecraft caught this tumultuous solar prominence as it twisted and turned over about 18 hours, as seen in profile above the Sun?s surface, before disappearing (Oct. 8, 2010). The cloud of cooler gases, suspended by magnetic forces,
October 11, 2010
Increased Auroral Activity Oct. 11-12 from a Halo CME Oct. 6, 2010

Increased Auroral Activity Oct. 11-12 from a Halo CME Oct. 6, 2010

Around 3:30 UT on October 6, 2010 a filament erupted in the northeast part of the solar disk (upper left area). Moving at around 375 km/s (850,000 miles per hour) the CME combined with the ambient solar wind then over
October 7, 2010
A Solar Eruption as the Earth Blocks SDO’s View of the Sun

A Solar Eruption as the Earth Blocks SDO’s View of the Sun

A filament erupted in the NE area of the sun. The eruption was observed by SDO and the associated Halo CME was seen by SOHO's C2 and C3 coronagraphs. SDO is currently in eclipse season so during this event the earth moved between SDO and the sun, moving across the sun for a few minutes.
October 5, 2010
Exceptional Rocket Waves Destroy Sun Dog

The Launch of the Solar Dynamics Observatory (Part 2)

Thursday morning seemed to take longer to arrive. Expectations were certainly higher, based in no small part on the fact that most of us had flights booked to take us home later that day. Washington DC had just gotten its
October 4, 2010
The Sun Observed by SDO - 171 Angstrom and Magnetic Field

A Solar Active Region’s Parting Flare

Solar sunspot group, active region (AR) 11109, is rotating out of view over the western limb of the sun. As it was moving out of the view of the earth and SDO it produced a C-class (C2.3) solar flare at
October 1, 2010
AV-021 SDO Rollout to Pad

The Launch of the Solar Dynamics Observatory (Part 1)

Getting out of Washington DC was not going to be easy. The city was bracing itself for the biggest snowstorm in almost a century over the weekend. The launch of the Solar Dynamics Observatory (SDO; the first mission from NASA’s
September 22, 2010
STEREO image composite of the CME from 12/12/2008

3D Visualization of a Coronal Mass Ejection

Our good friends and colleagues at Trinity College Dublin have created a 3D visualization of the propagation of a coronal mass ejection (CME). Using multiscale image processing and 3D visualization the team reconstructed the trajectory of an earth-directed CME observed
September 9, 2010

Solar Active Region’s Farewell Blasts

Just as sunspot group AR11105 rotated out of the Earth’s view it produced a spectacular show. A large prominence erupted along with a C3 solar flare and a Coronal Mass Ejection (CME) blasted away from the sun. This great show
September 9, 2010

Solar Eruptions with STEREO Ahead

A View of the Active Sun with EUVI, COR1 and COR2 A very busy active region popped off about ten blasts of solar material over a two-day period (Aug. 31- Sept. 2, 2010). With this composited image and movie three
September 8, 2010
The Sunspot and Solar Activity Cycle

Solar Activity and the Solar Cycle

The Sun is not just a big bright ball. It has a complicated and changing magnetic field, which forms things like sunspots and active regions. The magnetic field sometimes changes explosively, spitting out clouds of plasma and energetic particles into
August 29, 2010
Filament/Prominence Partial Eruption Captured by STEREO Ahead

Filament/Prominence Partial Eruption Captured by STEREO Ahead

On August 24th and 25th, the STEREO Ahead spacecraft observed an enormous filament on the southeastern edge of sun expand into a huge prominence. The images were recorded with the Extreme Ultraviolet Imager (EUVI) in the 304 Angstrom wavelength. The
August 8, 2010
Atmospheric Imaging Assembly

The Sun 2 Weeks With SDO/AIA (July 25 – August 7, 2010)

Here is a 2-week view of the sun as observed by the AIA (Atmospheric Imaging Assembly) instrument aboard the SDO (Solar Dynamics Observatory) spacecraft. This video contains 4 wavelength channels 304, 171, 193 & 211. First, all four wavelengths are
August 4, 2010

THEMIS All-Sky White-light Auroral Camera from August 4, 2010

On Feb. 16, 2006 the NASA-led THEMIS (Time History of Events and Macroscale Interactions During Substorms) mission was launched. This fleet of 5 spacecraft was tasked with understanding substorms in the magnetosphere, the power source of the aurora and consequence
August 3, 2010
One of the 2 Filament Eruptions Observed by SDO in 304 Angstroms

Complex Solar Flare and Filament Eruption Event

On August 1, 2010, the sun produced a complex event, or really a set of events. At approximately 8:55 UT a large filament on the northwest of the sun erupted and at nearly the same time in sunspot active region 11902,
July 28, 2010

Prominence Eruption Seen from Ground and Space

Around 13:00 UTC (8:00 EST) on July 28, 2010, a prominence on the southeast limb of the sun became unstable. The prominence erupted sending an immense amount of solar plasma and magnetic field away from the sun into space. Amateur
May 9, 2010

3 Tiny Little Flares: Even Tiny Solar Flares on the Sun are Huge

To put this in perspective, “TINY” = 10-20 Earths On May 8, 2010, the sun produced several relatively small solar flares, C and B-class solar flares on the solar flare scale (much like the earthquake Richter scale). In particular, the
April 22, 2010

A Coat of Many Colors – The SDO Dynamic Sun

One of the first movies from NASA’s SDO (Solar Dynamics Observatory) Mission this sequence of images gives us a first glimpse at the kinds of science SDO will open up to solar astronomers. On April 8, 2010, the sun produced