Daily Archives: September 17, 2013

Vega

bokfREq2bBUVega (α Lyr, α Lyrae, Alpha Lyrae) is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus. It is a relatively close star at only 25 light-years from Earth, and, together with Arcturus and Sirius, one of the most luminous stars in the Sun’s neighborhood.

Based on an observed excess emission of infrared radiation, Vega appears to have a circumstellar disk of dust. This dust is likely to be the result of collisions between objects in an orbiting debris disk, which is analogous to the Kuiper belt in the Solar System. Stars that display an infrared excess because of dust emission are termed Vega-like stars. Irregularities in Vega’s disk also suggest the presence of at least one planet, likely to be about the size of Jupiter, in orbit around Vega.

With SPONLI Space is getting closer!

The Sun Online and solar activity. September 17, 2013

Solar activity is very low, with the background X-ray flux of a low B-class level. No changes of solar activity are foreseen in the following 48 hours.The Earth is still inside a slow solar wind flow with the speed of about 350 km/s. The interplanetary magnetic field magnitude is 6 nT. The
geomagnetic conditions are quiet to moderate and expected to remain so.  The possible arrival of the fast speed stream from the small equatorial coronal hole, during the following hours, is not expected to result in the change of the current geomagnetic conditions.
INFO from Royal Observatory of Belgium.

Local time:9/17/2013 at 8:45:16 Local time:9/17/2013 at 8:45:16 Local time:9/17/2013 at 8:45:16 Local time:9/17/2013 at 8:45:16

Equipment: Coronado 90 + SBIG 8300s + LX75
Editor: Photoshop
Date: 17/09/13
Time GMT: 11:30:00
Exposure 0.09 sec.

 

With SPONLI Space is getting closer!