Thursday, August 22, 2013

Astronomy Picture of the Day

I haven't shown you one of these in quite awhile but couldn't resist. The transit of Venus right before your eyes. Can you believe how wondrously beautiful is this, our shining star, when photographed in various shades of ultraviolet light? 

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2013 August 20
See Explanation.  Clicking on the picture will download
 the highest resolution version available.
Venus and the Triply Ultraviolet Sun 
Image Credit: NASA/SDO & the AIA, EVE, and HMI teams; Digital Composition: Peter L. Dove
Explanation: An unusual type of solar eclipse occurred last year. Usually it is the Earth's Moon that eclipses the Sun. Last June, most unusually, the planet Venus took a turn. Like a solar eclipseby the Moon, the phase of Venus became a continually thinner crescent as Venus became increasingly better aligned with the Sun. Eventually the alignment became perfect and the phase of Venus dropped to zero. The dark spot of Venus crossed our parent star. The situation could technically be labeled a Venusian annular eclipse with an extraordinarily large ring of firePictured above during the occultation, the Sun was imaged in three colors of ultraviolet light by the Earth-orbiting Solar Dynamics Observatory, with the dark region toward the right corresponding to acoronal hole. Hours later, as Venus continued in its orbit, a slight crescent phase appeared again. The next Venusian solar eclipse will occur in 2117.

1 comment:

ishmael said...

Hi again from England..

I've just found the picture & after 3 months in hospital, it's really made my day !!

A fantastic look at our star !!

Take care