Daily Archives: April 18, 2014

The Sun Online and solar activity. April 18, 2014

The M7.3 flare peaking at 13:03 UT today was accompanied by a full halo CME first appearing in the SOHO/LASCO C2 field of view at 13:25 UT. The plane-of-the-sky projected speed of the CME was around 900 km/s. The bulk of the CME mass was going to the south-west, so we expect only a glancing blow when the corresponding ICME arrives at the Earth  on April 21, resulting in a geomagnetic storm with K index most probably up to 6. The halo CME also produced a proton event at energies above 10 MeV.

Equipment: Coronado 90 +  Imaging Source DMK  + LX75
Processing: Photoshop, Avistack 300 frames
Date: 04/18/14
Time UT: 17:00
Exposure 1/500 sec.

With SPONLI Space is getting closer


Red Moon, Green Beam

D140414_47_ApolloEclipse_AFCc_16f Image Credit & Copyright: Dan Long (Apache Point Observatory) – Courtesy: Tom Murphy (UC San Diego)
This is not a scene from a sci-fi special effects movie. The green beam of light and red lunar disk are real enough, captured in the early morning hours of April 15. Of course, the reddened lunar disk is easy to explain as the image was taken during this week’s total lunar eclipse. Immersed in shadow, the eclipsed Moon reflects the dimmed reddened light of all the sunsets and sunrises filtering around the edges of planet Earth, seen in silhouette from a lunar perspective. But the green beam of light really is a laser. Shot from the 3.5-meter telescope at Apache Point Observatory in southern New Mexico, the beam’s path is revealed as Earth’s atmosphere scatters some of the intense laser light. The laser’s target is the Apollo 15 retroreflector, left on the Moon by the astronauts in 1971. By determining the light travel time delay of the returning laser pulse, the experimental team from UC San Diego is able to measure the Earth-Moon distance to millimeter precision and provide a test of General Relativity, Einstein’s theory of gravity. Conducting the lunar laser ranging experiment during a total eclipse uses the Earth like a cosmic light switch. With direct sunlight blocked, the reflector’s performance is improved over performance when illuminated by sunlight during a normal Full Moon, an effect fondly known as The Full Moon Curse. NASA APOD 18-Apr-14

The Trifid Nebula

3b18b3982c362334d9259b18bcab3fca.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Dean Salman

Also known as M20, this photogenic nebula is visible with good binoculars towards the constellation of Sagittarius. The energetic processes of star formation create not only the colors but the chaos. The red-glowing gas results from high-energy starlight striking interstellar hydrogen gas. The dark dust filaments that lace M20 were created in the atmospheres of cool giant stars and in the debris from supernovae explosions. The light from M20 we see today left perhaps 3,000 years ago.

Imaging telescopes or lenses: Intes Micro MN84
Imaging cameras: QSI 583 wsg
Mounts: Astro-Physics 1200 GTO
Software: Adobe Photoshop CC, PixInsight
Filters: Astrodon H-alpha 3nm narrowband filter, Astrodon Luminance, Astrodon RGB filter set
Dates: Oct. 26, 2013
Astrodon H-alpha 3nm narrowband filter: 6×1200″
Astrodon Luminance: 9×600″
Astrodon RGB filter set: 72×600″
Integration: 15.5 hours

Author: Dean Salman

AstroPhotography of the day by SPONLI
18 April 2014