Nebula in Cepheus
Cosmic pillars of gas and dust
Hot, young stars and cosmic pillars of gas and dust seem to crowd into NGC 7822. At the edge of a giant molecular cloud toward the northern constellation Cepheus, the glowing star forming region lies about 3,000 light-years away. Within the nebula, bright edges and dark shapes are highlighted in this colorful skyscape. The image includes data from narrowband filters, mapping emission from atomic oxygen, hydrogen, and sulfur into blue, green, and red hues. The atomic emission is powered by energetic radiation from the hot stars, whose powerful winds and radiation also sculpt and erode the denser pillar shapes. Stars could still be forming inside the pillars by gravitational collapse, but as the pillars are eroded away, any forming stars will ultimately be cutoff from their reservoir of star stuff. This field spans around 40 light-years at the estimated distance of NGC 7822.
NGC 7822 in Cepheus
|Imaging telescope||Celestron Rowe-Ackermann Schmidt Astrograph 8″|
|Imaging camera||ZWO ASI 1600MM PRO|
|Mount|| iOptron CEM60|
|Guiding||Guidescope 240mm, ZWO ASI 120MM|
|Filter||Baader f/2 Highspeed H-Alpha, Baader f/2 Highspeed OIII, Baader f/2 Highspeed SII (each 2″)|
|Accessories||Starizona Filter Slider, Celestron Focus Motor for SCT|
|Integration||21.2 hours, H-Alpha: 377×100″, OIII: 173×100″, SII: 213×100″|
|Dates of recording||Dec. 3, 2019, Dec. 4, 2019, Dec. 29, 2019, Dec. 30, 2019|
NGC 7822 PRINT
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