Dreyer's Nebula (Evan Tsai)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: IC 446 · IC 447 · NGC 2245 · NGC 2247

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Dreyer's Nebula

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Dreyer's Nebula

IC 447 is a reflection nebula located in the constellation Monoceros, also known as the Dreyer's Nebula. It is part of the Monoceros R1 nebula complex, an active star-forming region approximately 716 light-years away from Earth.

Unlike emission nebulae, reflection nebulae do not emit their own light but instead reflect the light from nearby young stars. The dust and gas in IC 447 primarily reflect the light from hot, blue stars nearby, which have a higher temperature than the Sun.

The appearance of IC 447 is bright and surrounded by a complex structure consisting of multiple dark nebulae and reflection nebulae, and it lies close to the well-known Cone Nebula (Christmas Tree Nebula).

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

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