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Wildrik Botjes Planetarium
Physics & Astronomy Department

Astr110 Photography Projects, Fall 2007

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Bubble Nebula- NGC 7635, Kelsey Kuiper

Bubble Nebula

The Bubble Nebula is a nebula formed from a massive star. This means that a particular star has “come to ager” or run out of hydrogen to fuel its burn, and the image we see is the materials that have come from hot radiation from the bubble’s central star. The Bubble Nebula, in particular, is believed to be a shell of ionized gas. It has been created by the stellar wind of some massive star. The large reddish could of hydrogen gas around the bubble has formed the bubble that we can see. Interestingly, this bubble will eventually form another star, and this is the beginigng of the formation of a star cluster. The Bubble Nebula (NGC7635) is seen towards the constellation of Cassiopeia and is thought to be about 11,300 light-years away from the Earth. Another interesting fact about this nebula is that it is part of a much larger complex of stars and shells.

In the image above of the Bubble Nebula we can see in the center a faint outline of the bubble itself- an orange colored ring shaped image. We can also see some of the radiation that has escaped further than the central area. This radiation is seen as a distinct red color looking like a cloud of gasses. The calculated linear size of this nebula is 11 light-years across.

References: Hynes, Stephen J.. "Planetary Nebulae ."Messier's Planetary Nebulae <http://seds.org/messier/planetar.htmll>.

Cromen, Russell. "NGC 7635." The Bubble Nebula. <http://apod.nasa.gov/apod/ap051107.htmll>

Right Ascension (J2000) 23:20:42
Declination (J2000) +61:12:00
Filters used blue(B), green(V), red(R), and clear(C)
Exposure time per filter 5x60 seconds in C, 5x60 seconds in BVR
Date observed

October 23, 2007 (CRVB)