... 2005 November 20 . Rays from an Unexpected Aurora . ... For starters, on this Friday morning in August 2002, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Large sunspot groups indicate that activity from an active Sun is relatively likely, possibly causing other streams of energetic particles to cascade onto the Earth and so causing more auroras . ... About APOD | ...

Astronomy Picture of the Day . Rays from an Unexpected Aurora . ... 5.08.2002 . ... For starters, last Friday morning, no intense auroral activity was expected at all. Possibly more surprising, however, the aurora appeared to show an usual structure of green rays from some locations. ... Mirroring the green rays is a red band, somewhat rare in its own right. ... August . ... August 2002 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: aurora . ...

... Magnetic storms online . ... Geomagnetic activity forecast . ... November : 2015 . ... Magnetic storm of level G1 (minor) are expected . From 2 November 2015 to 28 November 2015 the following magnetic storms and disturbances are expected: . ... November 03, 2015 geomagnetic storm of level G2 (moderate) . ... November 09, 2015 geomagnetic storm of level G1 (minor) . ... November 02, 2015 geomagnetic storm of level G3 (strong) 2 November 2015 - 28 November 2015 . 01.11.2015 . ...

The broad background peak of activity of this year's Leonid meteor shower is expected to occur around dawn on the 17th November. ... It is anticipated that rates will be up to about 50 meteors per hour for a few hours around peak activity, under ideal conditions. ... According to Armagh Observatory astronomer, David Asher, and co-workers, there will be two additional peaks of activity after the broad stream peak. ... Leonid Meteor Pages . The unexpected 2004 Leonid meteor shower - PDF Format . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

Astronomy Discussion Forums . ... I Expected More Sense Than That. ... Post Message | ... Posted by Richard D. Stafford, Ph.D. on November 8, 2002 04:14:05 UTC . ... You are missing the point - harvey1 - November 8, 2002 - 13:10 UTC . I hope Stafford doesn't mind my intruding his forum - mrsouza - November 8, 2002 - 14:55 UTC . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... I.A.Dynnikov, Three-page approach to knot theory. ... Universal semigroup, Funktsional'nyi Analiz I Prilozhenija, 34 (2000), no.1, 29-40 (Russian); English translation in Functional Analysis and Its Appl. 34 (2000), no.1, 24-32. I.A.Dynnikov, Finitely presented groups and semigroups in knot theory. ... Math. 2000, no. ... English translation: Russian Math. ... A.Vershik, Numerical invariants of exponential groups, and a locally free approximation of braid groups (in Russian), Zapiski Nauchn. ...

THE RELATIVE MONTHLY MEAN SUNSPOT NUMBER ON NOVEMBER 2012 HAS MADE Wnov.= ... Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 26.11 - 02.12.2012, Forecast on 03 - 10.12.2012, Carrington Rotations 2130, 2131 (04,86.11, 02,17.12.2012) SUNSPOT-FORMING ACTIVITY OF THE SUN WAS REMAINED ON THE AVERAGE LEVEL. ... NEXT WEEK THE LEVEL OF SUNSPOT ACTIVITY IS EXPECTED TO BE THE AVERAGE AND THE LAST TWO DAYS-ON LOW LEVELS. ... NEXT WEEK THE GEOMAGNETIC CONDITION IS EXPECTED UNSETTLED AND QUIET. ...