The top ten ephemeral moments in the sky

As part of the build-up to next week’s Mercury transit, I’ve put together a list for Sky & Telescope on the top ten fleeting phenomena in astronomy…


At Number 10: An Overhead Pass of the International Space Station.
Image: Bob King.


Coming soon: there will be a lovely ‘ephemeral moment’ at the end of this month… Shortly after sunset on 28 and 29 November, a crescent moon will hang above the horizon next to three planets.


Image: Sky & Telescope.


 

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