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The Process

The Process
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How to observe and photograph Pluto

How to observe and photograph Pluto
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Bad Astronomy | M73 is definitely not an actual star cluster

I love a good coincidence, and this story has two. One is pedestrian, the other cosmic. It starts with me pondering Gaia data. Gaia is a European Space Agency observatory that is revolutionizing astronomy. Its mission is to accurately map the positions, colors, distances, and motions of over a billion stars yes, a billion, about 1% of all the stars in our galaxy and create a massive database of the results, essentially a 3D map of the Milky Way galaxy. And, sometimes, they can solve age-old mysteries. For example, the star Albireo is a close double star, but are the two stars physically related? Astronomers argued for a long time, but Gaia data easily showed that nope, they re not related, at two very different distances but just coincidentally aligned in the sky.

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