Category Archives: sun
Our Sun is Awesome
It really is. I mean, nevermind that it comprises over 99% of all the mass in our solar system, that it supplies our planet with the energy needed to sustain life on its surface, that its constantly-blowing solar wind helps keep some of those nasty cosmic particles out of the planetary neighborhood, and that it makes a bright sunshiny day even possible (but remember to wear sunscreen!)… in addition to all that, it’s also just really, really cool.
Watch the video above and you’ll see what I mean.
A Backyard View of a Solar Prominence
Hydrogen-alpha photo of the Sun by Alan Friedman
An enormous tree-shaped prominence spreads its “branches” tens of thousands of miles above the Sun’s photosphere in this image, a section of a photo acquired in hydrogen alpha (Ha) by Alan Friedman last week from his backyard in Buffalo, NY. Writes Alan on his blog, “gotta love a sunny day in November!”
Check out the full image — along with an idea of just how big this “tree” actually is — here.
Experience Eclipse Totality (VIDEO)
Totality — that brief period during a solar eclipse when the Moon is completely centered in front of the Sun’s disk — is a truly amazing sight, so much so that many people who have seen it once (a privileged group that doesn’t include me, sadly!) will travel across the globe in an effort witness it again and again.
During solar eclipse totality the sky not only becomes dark, dropping the temperature and sometimes even allowing stars to be seen, but also the Sun’s outer atmosphere is revealed around the silhouette of the Moon for a few short moments. Unfortunately this is not easily captured on camera because of the rapidly changing lighting situations, and when it is it pales in comparison to the real thing (or so I hear.)
“Diamond ring” effect seen during the Nov. 2012 total solar eclipse
The video above, taken during the November 14 eclipse from Queensland, shows the moments of totality pretty nicely although the streamer effect can’t really be made out. Still, we get a good idea of how the light changes and we can see another effect called “Baily’s Beads”, where sunlight peeks through some of the relief of the Moon’s terrain along its outer limb. Also the “diamond ring” effect can be seen as the Sun is uncovered.
Enjoy, and thanks to YouTube user solareclipse eclipsevidgvale for the upload!
Watch Today’s Total Eclipse Live
Total Solar Eclipse of March 29, 2006 (© Fred Espenak)
Today, tens of thousands of people are gathering in northeastern Australia to witness one of the most amazing and dramatic astronomical events known: a total solar eclipse. At 2:39 p.m. EDT (19:39 UT) the Moon will begin to pass in front of the Sun for viewers around Cairns, Australia, leading up to a brief period of totality at 5:12 p.m. EDT (22:12 UT). At this time, the Sun will be completely blocked by the disk of the Moon, revealing the wispy strands of the Sun’s outer corona. It will be a spectacular view that’s possible at no other time, and will give scientists a chance to study some curious aspectsof the Sun’s atmosphere.
“On a scale of one to ten, a total solar eclipse is a MILLION.” – Fred Espenak, aka “Mr. Eclipse“
Here Comes the Sun! CME Headed Toward Earth, Saturday Delivery
Compiled SDO/AIA image of the July 12 X-class flare
As you read this, a huge cloud of charged solar particles is speeding toward our planet, a coronal mass ejection resulting from an X1.4-class flare that erupted from sunspot 1520 on July 12. The CME is expected to collide with Earth’s magnetic field just after 6 a.m. EDT Saturday, potentially affecting satellite operations and tripping alarms on power grids, as well as boosting auroral activity. (And this may not be the last we see from this sunspot, either.)
And The Sun Is Eclipsed By The Moon
May 20, 2012 annular eclipse seen from Dallas, TX USA. © Jason Major
If you didn’t get a chance to see the annular eclipse from where you are, either due to weather or location, here’s a shot of it I managed to grab from Dallas, TX just as the Sun emerged from some low clouds and right before it set beyond the trees.It was visible for perhaps five minutes, but what a great view!
See another shot below:
How Big is a CME?
This big!
AIA 304 image of the April 16, 2012 CME with Earth inserted to scale. (NASA/SDO/J. Major)
The M1.7-class flare that erupted from active region 1461 on Monday, April 16 let loose an enormous coronal mass ejection many, many times the size of Earth — and I for one was glad that our planet was safely tucked out of aim at the time… and 93 million miles away!
