Daily Archives: September 13, 2013

Lunar eclipses

lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the Sun, Earth, and Moon are aligned (in “syzygy”) exactly, or very closely so, with the Earth in the middle.
Hence, a lunar eclipse can only occur the night of a full moon. The type and length of an eclipse depend upon the Moon’s location relative to its orbital nodes. Unlike a solar eclipse, which can only be viewed from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth.
A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the moon’s shadow. Also unlike solar eclipses, lunar eclipses are safe to view without any eye protection or special precautions, as they are no brighter (indeed dimmer) than the full moon itself.

With SPONLI Space is getting closer!

Crescent Moon Meets Evening Star

MoonVenusArg_2013_09_08_2169_16s950
Image Credit & Copyright: Luis Argerich,
Agustin Llorens, Guido Medici, Gabriel Remotti

Explanation: On September 8, brilliant planet Venus appearing as the evening star stood near a slender, crescent Moon at sunset. The close celestial pairing or conjunction was a scene enjoyed by skygazers around the world. But from some locations in South America, the Moon actually passed in front of Venus in a lunar occultation. Captured near Las Cañas, Uruguay, this two frame mosaic telescopic view shows the Moon and Venus before and after the occultation. The silvery evening star appears at right just before it winked out behind the dark lunar limb, still in bright twilight skies. About an hour later Venus emerged (left) along the three day old Moon’s sunlit edge.

The Sun Online and solar activity. September 13, 2013

According to the Royal Observatory of Belgium:
Solar activity is very low, no C-class flares in past 7 days. There are five numbered active regions on the solar disc today, none is expected to produce important flares. The coronal hole fast solar wind arrived around 18:00 UT on September 12. It produced only unsettled conditions. Quiet to unsettled conditions are expected for the next 48h.

Local time:9/13/2013 at 7:44:55 Local time:9/13/2013 at 7:44:55 Local time:9/13/2013 at 7:44:55 Local time:9/13/2013 at 7:44:55

Equipment: Coronado 90 + SBIG 8300s + LX75
Editor: Photoshop
Date: 13/09/13
Time GMT: 19:00:00
Exposure 0.09 sec.

With SPONLI Space is getting closer!

Stars and Dust Across Corona Australis

NGC6726-9Bobillo_hires

Image Credit & Copyright: Ignacio Diaz Bobillo

Explanation: Cosmic dust clouds sprawl across a rich field of stars in this sweeping telescopic vista near the northern boundary of Corona Australis, the Southern Crown. Less than 500 light-years away the dust clouds effectively block light from more distant background stars in the Milky Way. The entire frame spans about 2 degrees or over 15 light-years at the clouds’ estimated distance. Near center is a group of lovely reflection nebulae cataloged as NGC 6726, 6727, 6729, and IC 4812. A characteristic blue color is produced as light from hot stars is reflected by the cosmic dust. The dust also obscures from view stars in the region still in the process of formation. Smaller yellowish nebula NGC 6729 surrounds young variable star R Coronae Australis. Below it are arcs and loops identified as Herbig Haro objects associated with energetic newborn stars. Magnificent globular star cluster NGC 6723 is at the right. Though NGC 6723 appears to be part of the group, its ancient stars actually lie nearly 30,000 light-years away, far beyond the young stars of the Corona Australis dust clouds.