Saturday, May 27, 2017
Comet Johnson-C/2015V2 near the double star Delta Bootis (in the constellation Bootes) Imaged with a Nikon 180mm lens at f3.2 ISO 2000 (Stack of 21 - 30 second exposures)
The comet is only a few days from orbital plane crossing,and the bright dust tail and thin dimmer gas tail are now nearly 180 degrees apart!
This was last night with a 10 f/3.8 Orion astrograph and a 2h exposure
PARA VER FOTOS EN HD ABRIR SIGUIENTE LINK
RESEARCHERS SAW A PARTIAL SOLAR ECLIPSE IN SPACE WHEN IT CAUGHT THE MOON PASSING IN FRONT OF THE SUN. THE LUNAR TRANSIT LASTED ALMOST AN HOUR, BETWEEN 2:24 AND 3:17 P.M. EDT, WITH THE MOON COVERING ABOUT 89 PERCENT OF THE SUN AT THE PEAK OF ITS JOURNEY ACROSS THE SUN’S FACE.
It's ok to look. Yesterday @NASASunScience witnessed something peculiar happening around the sun.
Researchers saw a partial solar eclipse in space when it caught the moon passing in front of the sun. The lunar transit lasted almost an hour, between 2:24 and 3:17 p.m. EDT, with the moon covering about 89 percent of the sun at the peak of its journey across the sun’s face. The moon’s crisp horizon can be seen from this view because the moon has no atmosphere to distort the sunlight.
While the moon’s edge appears smooth in these images, it’s actually quite uneven. The surface of the moon is rugged, sprinkled with craters, valleys and mountains. Peer closely at the image, and you may notice the subtle, bumpy outline of these topographical features.
Sweeping through this stunning field of view, Comet 71P/Clark really is in the foreground of these cosmic clouds. The 2 panel telescopic mosaic is color enhanced and is about 5 degrees (10 full moons) across. It captures the faint comet's position on the night of May 23/24 over 5 light-minutes from Earth, very near the line-of-sight to bright star Antares and the Rho Ophiuchi cloud complex. In the frame Antares, also known as Alpha Scorpii, is at bottom center surrounded by a dusty cosmic cloud reflecting the cool giant star's yellowish light. Globular star cluster M4 shines just right of Antares, but M4 lies some 7,000 light-years away compared to Antares' 500 light-year distance. Slightly closer than Antares, Rho Ophiuchi's bluish starlight is reflected by the dust in molecular clouds toward the top. You can spot the small coma and short tail of the comet as a faint smudge near the center of the left edge of the frame. Just look for the comet's striking greenish color, produced as diatomic carbon molecules fluoresce in sunlight.