The Magellanic Clouds

Have you ever wondered what the night sky might look like on a planet outside the Milky Way? Imagine the sight of the entire galaxy hanging in the sky above you.

It might look a little like this…

Composite image made up of: Crystal Lake, California (Mountains), Silverado, NGC 3370 & Andromeda (Spiral Galaxy), NGC 1313 (Irregular Galaxy).

View from a hypothetical planet orbiting a star in the outer region of the Small Magellanic Cloud (SMC). The SMC hangs in the sky (right), with the Milky Way in the background (left).

One of the stars I’m studying is in the Magellanic Clouds — two small irregular galaxies close to the Milky Way. On a hypothetical planet around this star, the sky would be an awesome sight to behold. The planet itself would be bathed in a near perpetual twilight, by the light from the Milky Way’s 200 billion stars. The galaxy would almost certainly be bright enough to cast shadows, and possibly even be visible during the day. In the foreground, the closer of the two magellanic clouds looms, similar in apparent size but only because it’s much much closer.

The Magellanic Clouds are in the process of tearing each other apart, while simultaneously being shredded by the vast gravitational pull of the Milky Way itself. The star’s in a region called the Magellanic Bridge. A stream of gas, dust and stars trapped in a tug of war between the two smaller galaxies.

During the few hundred million years while these galaxies have been in our neighbourhood, they’ve been gradually siphoned away into our own galaxy, via a huge channel called the Magellanic Stream. The Magellanic stream is huge. It spans nearly 180° of the sky, but you can’t see it — it’s mainly made up of hydrogen gas, with a few stray stars caught up in the pull. A huge dark streamer in the night.

This radio telescope image (which I can’t take credit for) shows the molecular gas in the Magellanic Stream. The two bright spots on the left are the galaxies themselves.

Image Credit: M.E. Putman (University of Colorado), L. Staveley-Smith (CSIRO), K.C. Freeman (Australian National University), B.K. Gibson (Swinburne University) and David G. Barnes (Swinburne University)

About Invader Xan

Molecular astrophysicist, usually found writing frenziedly, staring at the sky, or drinking mojitos.
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5 Responses to The Magellanic Clouds

  1. Dan Jensen says:

    Beautiful. I’ve always wondered the same thing… what our galaxy would look like from one of our orbiting satellite galaxies. Well done!.

  2. madsophia says:

    mineral king is kind of a bitch to get to. it’s a nasty, narrow, partially dirt, 24 mile road with so many twists it takes 1.5 hours to get up there. the base camp ground at cold springs is amazing! it’s at 7600 ft. beautiful territory. if you come out here, I will take you there!
    this is where the trail split

    here’s the whole set from that trip, check ’em out!

  3. invaderxan says:

    Oh totally. I saw a load of pictures, and now it’s on my big list of “places I need to go to”! :D

  4. madsophia says:

    just so you know,
    crystal lake is one of the most magical and wonderful places on earth, the Mineral King area of Sequoia National Park. I have not been to crystal lake myself, but i have been to monarch lake, which is off of the same trail, is also above 10,00 ft and is magnificent!

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