**Astronomy Picture of the Day**

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Kind-1 (TextNote)

2026-04-17T04:19:53Z

Astronomy Picture of the Day

17 April 2026

M82: Starburst Galaxy with a Superwind

https://apod.nasa.gov/apod/image/2604/M82_V3_1024.jpg

Image Credit: Arnaud Malleval

Explanation:

Messier 82 is a starburst galaxy with a superwind.

In fact, through supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow.

Evidence for the superwind from the galaxy's central regions is clear in the sharp telescopic portrait.

The composite image includes 33 hours of narrowband data, highlighting emission from long outflow filaments of atomic hydrogen gas in reddish hues.

Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space.

Triggered by a close encounter with nearby large galaxy M81, the furious burst of star formation in M82 should last about 100 million years or so.

Also known as the Cigar Galaxy for its elongated visual appearance, M82 is about 30,000 light-years across.

It lies 12 million light-years away near the northern boundary of Ursa Major.

#APOD #M82 #Messier82 #StarburstGalaxy #Superwind #GalacticOutflow

https://apod.nasa.gov/apod/ap260417.html

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  "content": "**Astronomy Picture of the Day**\n\n17 April 2026\n\n**M82: Starburst Galaxy with a Superwind**\n\nhttps://apod.nasa.gov/apod/image/2604/M82_V3_1024.jpg\n\nImage Credit: Arnaud Malleval\n\nExplanation:  \n\nMessier 82 is a starburst galaxy\nwith a superwind.\n\nIn fact, through supernova explosions and\npowerful winds from massive stars,\nthe burst of star formation in M82\nis driving a prodigious outflow.\n\nEvidence for the\nsuperwind\nfrom the galaxy's central regions is clear in the\nsharp telescopic portrait.\n\nThe composite image includes 33 hours of narrowband data,\nhighlighting emission from\nlong outflow filaments of atomic hydrogen gas in reddish hues.\n\nSome of the gas in the superwind,\nenriched in heavy elements\nforged in the massive stars,\nwill eventually escape into\nintergalactic space.\n\nTriggered by a\nclose encounter with\nnearby large galaxy M81,\nthe furious burst of star formation in M82 should last about\n100 million years or so.\n\nAlso known as the Cigar Galaxy for its elongated visual appearance,\nM82 is about 30,000 light-years across.\n\nIt lies 12 million light-years away near the northern boundary of\nUrsa Major.\n\n#APOD #M82 #Messier82 #StarburstGalaxy #Superwind #GalacticOutflow\n\nhttps://apod.nasa.gov/apod/ap260417.html\n",
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