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  • Photo du rédacteurCapt.Eric Recurt

The Tarantula Nebula in Narrowband by HORUS under the darkest skies on Earth !:

We are slowly but surely making progress on our first operational setup in Chile: HORUS.

This is the result of a 29 hours in Halpha, 11 hours in O III and 18 hours in S II with Baader filters of UNTRACKED 10 minutes exposures.

This image is still lacking of proper calibration though, we had to properly collimate the optics and solve a few issues with remote operation.

Progress is significant and is a good training for the coming larger 750mmF2.8 setup.

The Paramount MYT+ revealed to be an excellent choice, we are still tuning up the meridian flip.

Our Team is now satisfied with those first tests and the quality of DSC skies turns out to be... exceptional! : the LMC was very low above the horizon : between 20 and 30 degrees during the whole exposure.

We will publish a higher resolution version in the future.

Happy Skies above Chile!

Data : Phillip Esce from USA

Processing : Roberto Colombari from Brazil

The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.[5] At a distance of around 50 kiloparsecs (≈160,000 light-years),[2][6][7][8] the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal (~16 kpc) and the possible dwarf irregular galaxy known as the Canis Major Overdensity. Based on readily visible stars and a mass of approximately 10 billion solar masses, the diameter of the LMC is about 14,000 light-years (4.3 kpc). It is roughly a hundredth as massive as the Milky Way[3] and is the fourth-largest galaxy in the Local Group, after the Andromeda Galaxy (M31), the Milky Way and the Triangulum Galaxy (M33).

The LMC is classified as a Magellanic spiral.[9] It contains a stellar bar that is geometrically off center, suggesting that it was a barred dwarf spiral galaxy before its spiral armswere disrupted, likely by tidal interactions from the Small Magellanic Cloud (SMC) and the Milky Way's gravity.[10]

With a declination of about −70°, the LMC is visible as a faint "cloud" from the southern hemisphere of the Earth and from as far north as 20° N. It straddles the constellationsDorado and Mensa and has an apparent length of about 10° to the naked eye, 20 times the Moon's diameter, from dark sites away from light pollution.[11]

The Milky Way and the LMC are predicted to collide in approximately 2.4 billion years.[12]

(Wikipedia 2021)


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