Saturday, February 25, 2017

AURORAS Taken by B.Art Braafhart on February 25, 2017 @ Salla, Finnish Lapland

PLANET COMET Taken by Fins Eirexas on January 22, 2017 @ Basoñas, Galiza (NW Iberian Peninsula)



Yesterday at the IMERSA Summit. Chuck Rau from Seiler Instruments, representing ZEISS in the United States and Canada talked about professional consultant work in our field at the System Matters session and may have triggered a discussion on honest marketing comparing 8k fulldome systems (actually 6.5k) with "true" 8k systems. It should be in the interest of customers and all partners in the industry to market correct numbers, also knowing that resolution is only one point in the spec of fulldome systems. Image quality and good perfomance are depending on many other aspects of hardware and software.
Good to have such meetings to avoid confusions.

COMET 45P/HONDA-MRKOS-PAJDUSAKOVA Taken by Yasushi Aoshima on February 19, 2017 @ Shizuoka, JAPAN


A solar prominence gathered itself into a twisting cone, then rose up and broke apart in a delicate dance of plasma above the sun (Feb. 20, 2017). The event, observed in a wavelength of extreme ultraviolet light, lasted just about four hours. Prominences are unstable clouds of plasma suspended above the sun's surface by magnetic forces. This kind of event is not uncommon. The brighter area near the bottom of the images is an active region.

Credit: Solar Dynamics Observatory, NASA.



NASA’s Juno spacecraft skimmed the upper wisps of Jupiter’s atmosphere when JunoCam snapped this image on Feb. 2 at 5:13 a.m. PT (8:13 a.m. ET), from an altitude of about 9,000 miles (14,500 kilometers) above the giant planet’s swirling cloudtops.

Streams of clouds spin off a rotating oval-shaped cloud system in the Jovian southern hemisphere. Citizen scientist Roman Tkachenko reconstructed the color and cropped the image to draw viewers’ eyes to the storm and the turbulence around it.

JunoCam's raw images are available at for the public to peruse and process into image products.

More information about Juno is online at and

Credits: NASA/JPL-Caltech/SwRI/MSSS/Roman Tkachenko