Image: 22 years of SOHO
The activity cycle of the sun – where the number of sunspots increase and decrease – has been monitored regularly for around 250 years, but the use of space-based telescopes has given us a whole new perspective of our ...
The activity cycle of the sun – where the number of sunspots increase and decrease – has been monitored regularly for around 250 years, but the use of space-based telescopes has given us a whole new perspective of our ...
Space Exploration
Feb 26, 2018
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ESA and NASA's Solar and Heliospheric Observatory, or SOHO, saw a bright comet plunge toward the sun on Aug. 3-4, 2016, at nearly 1.3 million miles per hour. Comets are chunks of ice and dust that orbit the sun, usually ...
Space Exploration
Aug 5, 2016
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The sun experiences both calm and tempestuous periods of activity. At its most active, our star can fling out multiple bursts of particles in a single day in events known as coronal mass ejections, or CMEs. Particles within ...
Space Exploration
Dec 7, 2015
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For an astronomer, discovering a comet can be the highlight of a lifetime. Great comets carry the names of their discoverers into history. Comet Halley, Comet Lovejoy, Comet Hale-Bopp are just a few examples….
Space Exploration
Oct 26, 2015
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It's a discovery that could come any day now.
Space Exploration
Sep 11, 2015
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In 1995, a new solar observatory was launched. A joint project of ESA and NASA, the Solar and Heliospheric Observatory – SOHO – has been sending home images of our dynamic sun ever since. SOHO was planned to open up a ...
Space Exploration
Jul 31, 2015
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The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and die down repeatedly. Its Extreme ultraviolet Imaging Telescope has taken images ...
Space Exploration
Jul 13, 2015
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An elongated solar filament that extended almost half the sun's visible hemisphere erupted into space on April 28-29, 2015, in a large burst of bright plasma. Filaments are unstable strands of solar material suspended above ...
Space Exploration
May 5, 2015
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Like coins, most comet have both heads and tails. Occasionally, during a close passage of the Sun, a comet's head will be greatly diminished yet still retain a classic cometary outline. Rarely are we left with nothing but ...
Space Exploration
Mar 3, 2015
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A newly-discovered comet may soon become bright enough to see from a sky near you. Originally dubbed SOHO-2875, it was spotted in photos taken by the Solar and Heliospheric Observatory (SOHO) earlier this week. Astronomer ...
Space Exploration
Feb 25, 2015
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