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Submitted on 2004-11-09
Sunspot group 61 (NOAA 0696) fired a series of halo coronal mass ejections (CMEs). The geomagnetic field was seriously messed up when they arrived at Earth. On November 7, the group produced a X2.0 flare accompanied with another CME. The shock arrived at this very moment (November 9, 09:45UT)! A severe geomagnetic storm is expected.
Submitted on 2004-10-29
From October 10, up to October 16, the Sun was veiled in silence and produced hardly any flare. On October 17, the Sun changed track and gave birth to several sunspot groups during the next days.
Submitted on 2004-10-19
It is with great sadness that we inform you of the sudden death of Pierre Cugnon on October 18, due to complications following heart surgery.
Submitted on 2004-10-07
From September 10, 22:00UT until October 03, 10:00UT, the telescope "EIT" onboard of SOHO was taken from air. During that period, we could rely on SPIRIT data from the CORONAS-F satellite.
Every once in a while, forecasters have to deal with the fact that the Extreme ultraviolet Imaging telescope (EIT) is not available because of a so-called "CCD BAKEOUT". The detector of EIT is kept during operations at a temperature of about -67°C. At this low temperature, the camera condenses. During a bake out, the detector is warmed up to evaporate the condensation.
Submitted on 2004-09-23
Earth catches a graze as the CME which left the Sun on September 19, narrowly blew over our magnetosphere.
Submitted on 2004-09-03
Catania sunspot group 06 (NOAA 0667) is just an old acquaintance, formerly known as 90/0656. Last rotation, the group was so big you could see it on the solar disk with the naked eye. The pictures beneath show what is left of the group.
Submitted on 2004-06-14
Every first day of the month, the Monthly Sunspot bulletin is broadcast. Data of many worldwide distributed stations is used to calculate "The International Sunspot Number".
Submitted on 2004-06-01
In the morning of June 8, 2004 - visible in the whole of Europe - we can witness a rare astronomical event: the passage of Venus in front of the Sun. This is indeed rare: the last passage took place in 1882 and was only seen partially in Europe.
Submitted on 2004-05-17
Since May 12, the Pleiades are visible in images taken by LASCO/C3, a coronograph onboard of SOHO. As this cluster of stars 'travels' from left to right in a series of LASCO images, they will disappear end May. View in the image underneath the Pleiades in the field of view of LASCO/C3.
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