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Bode's Galaxy & Cigar Galaxy

CATALOG M81 / M82

DISTANCE 12m Light-Years

APPARENT MAGNITUDE 6.9 / 8.4

CONSTELLATION Ursa Major (The Great Bear)

OBJECT TYPE Spiral (M81) / Starburst (M82)

CAPTURE DATE 3/11/2026

TOTAL EXPOSURE TIME 3 hours

SKY QUALITY (BORTLE) 5

This image focuses on a high-stakes gravitational dance occurring 12 million light-years away in the constellation Ursa Major. The grand spiral is M81 (Bode’s Galaxy), a "Grand Design" galaxy featuring near-perfect arms and a supermassive black hole 70 million times the mass of our Sun. Its neighbour, M82 (The Cigar Galaxy), has been physically warped by M81’s gravity; this encounter triggered a violent "starburst" explosion in its core, causing M82 to form new stars at a rate ten times faster than our own Milky Way.

Switching to the wide-field image (click the link!) reveals that these two giants are not alone in the void. If you look closely at the surrounding neighbourhood, you can spot several smaller satellite galaxies that are also physically linked to the pair. NGC 3077 appears as a fuzzy, bright elliptical ball in the bottom right, while the faint, elongated smudge of NGC 2976 sits along the left edge.

Fun Facts

The "Bleeding" Galaxy: M82 (The Cigar) isn't just irregularly shaped; it’s actually "bleeding" red gas. The intense star formation in its center is causing massive plumes of glowing hydrogen to be blasted out of the galaxy at speeds of millions of miles per hour.
The Sleeping Giant: While M81 (Bode's) looks like a peaceful, perfect spiral, its core hides a monster; a supermassive black hole 70 million times the mass of our Sun. For comparison, the black hole at the center of our Milky Way is a "pipsqueak" at only 4 million solar masses.
A Slow-Motion Crash: The two galaxies are currently in the middle of a billion-year-long gravitational "wrestle." They passed close to each other about 300 million years ago, which is what triggered the explosion of star birth you see in M82 today.
A "Moon-Sized" View: Even though they are 12 million light-years away, M81 is so large that if your eyes could see its faint outer spiral arms, it would appear roughly the same size in the night sky as a full moon.
The 12-Million-Year Time Machine: The light hitting your screen right now left those galaxies when mastodons were still roaming the Earth and the very first ancestors of humans were only just beginning to appear in Africa.
A Galactic Neighbourhood: By looking at the wide-field view, you're seeing a "miniature universe." The four galaxies (M81, M82, NGC 3077, and NGC 2976) are all physically linked, dancing around each other in a pocket of space just "next door" to our own Milky Way.

Processing Notes

A rare clear night and dash to get the telescope set up, after returning from a meal out. My first night leaving the scope out to capture while I slept, 3 hours worth of 30 second exposures were stacked and processed resulting in the images you see here.