Tag Archives: sun


Well, as long as you know what you’re doing.

Any excuse.

What if We Blotted Out the Sun to Fight Global Warming? (Bloomberg)


Behold: a paper moon, a canvas Sun and cardboard clouds. Not really. To wit:

The featured picture of an orange coloured sky is real — a digital composite of two exposures of the solar eclipse that occurred earlier this month. The first exposure was taken with a regular telescope that captured an overexposed Sun and an underexposed Moon, while the second image was taken with a solar telescope that captured details of the chromosphere of the background Sun. The Sun’s canvas-like texture was brought up by imaging in a very specific shade of red emitted by hydrogen. Several prominences can be seen around the Sun’s edge. The image was captured just before sunset from Xilingol, Inner Mongolia, China. It’s also not make-believe to imagine that the Moon is made of dense rock, the Sun is made of hot gas, and clouds are made of floating droplets of water and ice.

(Image: Wang Letian (Eyes at Night)


This morning.

Harry Warren writes:

 Broadsheet readers may like to see today’s Annular Eclipse over Dublin, the Sun really has its hat on. I am looking forward to the next total eclipse visible from Ireland on the 23 September 2090…

Pic by Harry




This morning.

Outside Astronomy Ireland HQ, Blanchardstown, Dublin with its chairman David Moore (top) and members (including Gonzo, above) catching the partial eclipse.



An extremely well timed shot of a sailboat at dawn with a bonus feature. To wit:

…by a lucky coincidence, the background Sun itself appears unusual — it looks like the Greek letter Omega (Ω). In reality, the Sun remained its circular self — the Omega illusion was created by sunlight refracting through warm air just above the water. Optically, the feet of the capital Omega are actually an inverted image of the Sun region just above it. Although somewhat rare, optical effects caused by the Earth’s atmosphere can make distant objects near the horizon — including the Sun and Moon — look quite unusual. This single exposure image was taken over the Mediterranean Sea just over two weeks ago near Valencia, Spain.

(Image: Juan Antonio Sendra)


Solar activity follows an approximately 11 year cycle, the minimal point of which occurred last December. Solar Cycle 25 has now begun. To wit:

…[the] quiet Sun, at minimum activity, appears on the right of this split hemispherical view. In contrast, the left side shows the active Sun at the recognised maximum of Solar Cycle 24, captured in April 2014. The extreme ultraviolet images from the orbiting Solar Dynamics Observatory highlight coronal loops and active regions in the light of highly ionised iron atoms. Driving the space weather around our fair planet, Solar Cycle 24 was a relatively calm one and predictions are that cycle 25 will be calm too. The cycle 25 activity maximum is expected in July 2025. Solar Cycle 1, the first solar cycle determined from early records of sunspot data, is considered to begin with a minimum in February 1755.

(Image: NASA, SDO)


What’s that eerie glow down the highway? A still from ‘Stranger Things’? No, it’s dust orbiting the sun. To wit:

At certain times of the year, a band of sun-reflecting dust from the inner Solar System appears prominently just after sunset — or just before sunrise — and is called zodiacal light. Although the origin of this dust is still being researched, a leading hypothesis holds that zodiacal dust originates mostly from faint Jupiter-family comets and slowly spirals into the Sun. Recent analysis of dust emitted by Comet 67P, visited by ESA’s roboticRosetta spacecraft, bolster this hypothesis. Pictured when climbing a road up to Teide National Park in the Canary Islands of Spain, a bright triangle of zodiacal light appeared in the distance soon after sunset. Captured on June 21, the scene includes bright Regulus, alpha star of Leo, standing above center toward the left. The Beehive Star Cluster (M44) can be spotted below center, closer to the horizon and also immersed in the zodiacal glow.

(ImageRuslan Merzlyakov (RMS Photography)