Description: This image shows the spiral galaxy Messier 81 in its entirety.
Credit: Jonathan Irwin, DSS2.
Technical information: The image is a combination of exposures from the Isaac Newton Telescope on La Palma and Digitized Sky Survey (2 images).
Telescope: 2.5-m Isaac Newton Telescope and Digitized Sky Survey.
Instrument: Wide Field Camera (WFC).
Filters and exposure times: 2 × 100s exposures in B, 2 × 80s exposures in V and 2 × 60s exposures in R.
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