Daily Archives: December 29, 2013

Time-Lapse Auroras Over Norway

 Credit & Copyright: Terje Sørgjerd; Music: Gladiator Soundtrack: Now we are Free
Sometimes, after your eyes adapt to the dark, a spectacular sky appears. Such was the case in 2011 March when one of the largest auroral displays in recent years appeared over northern locations like the border between Norway and Russia. Pictured in the above time-lapse movie, auroras flow over snow covered landscapes, trees, clouds, mountains and lakes found near Kirkenes, Norway. Many times the auroras are green, as high energy particles strike the Earth’s atmosphere, causing the air to glow as electrons resettle into their oxygen hosts. Other colors are occasionally noticeable as atmospheric nitrogen also becomes affected. In later sequences the Moon and rising stars are also visible. With the Sun currently hovering near its time of maximum activity, there may be many opportunities to see similarly spectacular auroras personally, even from areas much closer to the equator.
NASA APOD 29-dec-13

NGC7023: Iris Nebula

ea26672466e7225a4440571a7acf544f.1824x0_q100_watermark_watermark_opacity-10_watermark_position-4_watermark_text-Hata from Taiwan

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near theMira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.

Imaging telescopes or lenses: CELESTRON Edge HD 800
Imaging cameras: Canon EOS 450D / Digital Rebel XSi / Kiss X2
Mounts: Orion Atlas EQ-G
Guiding telescopes or lenses: SkyWatcher 80/400
Guiding cameras: SBIG STV
Software: DeepSkyStacker, Adobe Photoshop CS5
Dates: July 14, 2012
Locations: Hata
Frames: 33×600″
Integration: 5.5 hours

Autor: Hata Sung

29 December 2013

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.

The Sun Online and solar activity. December 28, 2013

There were six C flares on the Sun during the past 24 hours. The brightest one was a C2.3 flare released by NOAA AR 11934, which peaked at 23:36 UT on December 27. Since AR 11934 and 11936 are still showing flux emergence, the probability for C flares over the next 48 hours is high (around 90%) and
for M flares around 25%.Over the past 24 hours, the solar wind speed as observed by ACE gradually decreased from about 310 km/s to about 280 km/s. Around 18h UT on December 27, the magnitude of the Interplanetary Magnetic Field dropped suddenly from about 8 nT to about 3 nT. A continuation of
nominal solar wind conditions is expected on December 28-30. Geomagnetic activity has been quiet over the past 24 hours (NOAA Kp between 0 and 2). Quiet geomagnetic conditions (K Dourbes < 4) are expected on December 28, 29, and 30, with a slight chance of active conditions (K Dourbes = 4) in
the first half of December 30 (in case the Earth suffers a glancing blow from the CME first observed by LASCO C2 at 7:36 UT on December 26).


Equipment: Coronado 90 + SBIG 8300s + LX75
Processing: Photoshop
Date: 12/28/13
Time UT: 17:00
Exposure 0.8 sec.

With SPONLI Space is getting closer!