> ## Content Index > Fetch the complete content index at: https://macobservatory.com/llms.txt > Use this file to discover other available public pages before exploring further. # M78: Two Fairly Bright Nuclei - URL: https://macobservatory.com/m78-two-fairly-bright-nuclei/ - Published: 2026-10-23T14:00:00.000Z - Updated: 2026-10-23T14:00:00.000Z - Description: Over 32 hours of integration on M78, the brightest reflection nebula in the sky, and a short story about a survey ship that reaches M78 two thousand years after its discovery. - Author: Andrew Burwell - Tags: Imaging The survey ship *Méchain* dropped out of its final transit at the edge of Orion B in the spring of 3780, two thousand years after the man it was named for first saw the place. Pierre Méchain had been hunting comets from Paris, and in early 1780 he wrote down a faint patch on the left side of Orion: two fairly bright nuclei, surrounded by nebulosity. Charles Messier added it to his list that December as number seventy-eight. Neither man could have guessed what the patch was hiding. From inside, the answer filled every screen. M78 is the brightest reflection nebula in the sky, a wall of dust some 1,600 light-years from Earth, lit blue by the two young stars Méchain had called nuclei. Behind the wall lay the dark cloud astronomers still called LDN 1630, and it was busy. The crew's infrared count passed one hundred and ninety newborn stars before lunch. Forty-five of them were still contracting, T Tauri stars flickering like nervous candles. Seventeen were firing jets of gas into the surrounding cloud, and where the jets struck, the gas glowed in small, bright knots. Dr. Anjali Rao, who had spent her career on star formation, found that the most surprising thing was not the stars at all. It was the hydrogen. It hung everywhere, a faint red veil over the entire region, far brighter than the old survey pictures suggested. She dug through the archive and found a note left by an amateur astronomer on old Earth, attached to a 32-hour image made in 2023: he had added hydrogen-alpha data late in his run and had been startled to find it blanketing the whole frame. "He was right," she said quietly. "Nobody believed how much there was." They stayed six months, mapped the jets, and cataloged a dozen young stars with planet-forming disks, any one of which might someday be somebody's sun. On the last night Rao wrote the closing entry in the ship's log. She tried several times to describe what they had seen, and deleted every attempt. **In the end she simply typed what Méchain had written two thousand years before: two fairly bright nuclei, surrounded by nebulosity. Nobody had ever said it better.** --- Capture Details AstroBin Top Pick Total Integration 32h 20m Captured Nov 1 to Nov 6, 2023 (5 nights) Integration per Filter Lum: 14h (84 × 600″) Red: 4h 40m (28 × 600″) Green: 4h 40m (28 × 600″) Blue: 4h 40m (28 × 600″) H-alpha: 4h 20m (26 × 600″) Equipment Telescope: Takahashi TOA-130NFB Camera: ZWO ASI6200MM Pro Mount: 10Micron GM1000 HPS Flattener: Takahashi 645 Flattener for TOA-130 (TKA31587S) Focuser: Pegasus Astro FocusCube2 Filter Wheel: ZWO EFW 7 x 2″ Power: Pegasus Astro Powerbox Advance Gen2 Flat Panel: DeepSkyDad Flap Panel (FP1) Filters Chroma Lum 50 mm, Chroma Red 50 mm, Chroma Green 50 mm, Chroma Blue 50 mm, Chroma H-alpha 3nm Bandpass 50 mm Software Aries Productions Astro Pixel Processor (APP), Pleiades Astrophoto PixInsight, Russell Croman Astrophotography BlurXTerminator, Russell Croman Astrophotography NoiseXTerminator, Russell Croman Astrophotography StarXTerminator Location DSP Remote Observatory: Animas, NM: Bortle 1 View the full-resolution image and technical details on [AstroBin](https://app.astrobin.com/i/psttyf?ref=macobservatory.com).