h alpha filter

Solar flare catch

A group of astronomers at ESA’s ESTEC were testing some solar observing equipment on 6 September and serendipitously captured a solar flare, which turned out to be one of the most powerful observed in the last decade.

The image shown here was taken with an iPhone through a special interference H-alpha filter (centred at the wavelength of hydrogen emission) mounted to a small dedicated solar telescope at 13:09:26 GMT. An X9.3 flare was observed to launch from the Sun by space telescopes at 12:02 GMT, meaning that this image was taken as the flare was in the gradual decay phase.

The flare is seen as the white cloudy feature with multiple ribbons towards the bottom right of the image. It appears as a lighter feature against the solar background average because of post-flare energy release visible in hydrogen emission from interconnected magnetic loops. North is up.

Credits: ESA/T.Baumann/B.Foing/J.Zender


Bubble Nebula - June 15, 2016 by Joseph Brimacombe
Via Flickr:
Taken from New Mexico Skies with an SBIG STL-11000 camera and 51-cm RCOS telescope on a Software Bisque PME II mount. Red and H-alpha filters were used and the data blended to form the final image.

Rosette-nebula in B/W. Adding Color-information without PS is very hard. This picture is just stacked in DSS. It is a 40min Exposure. The nebula is very hard to photograph because it is a H-alpha region. The IR-filter infront of the Camera-sensors block most of this light so you need much more exposure time to show the whole beauty of this nebula.


JP Brahic took this photo from France on April 5, 2013. He used a refractor Astro-Physics 155mm F/D 8.5 and a Bassler ACA1300 camera with filter H-Alpha 1A ° to capture the image.CREDIT: JP Brahic

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Jones 1, PK 104-29.1 by hauk sven
Via Flickr:
PK 104-29.1, also known as “Jones 1”, is a very faint, ghostlike planetary nebula in the constellation of Pegasus. This image was taken at the Mayall telescope with the Mosaic camera, with [OIII] (assigned a blue color) and H-alpha (orange) filters. In the image North is up and East is to the left. Imaged August 28, 2009.