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Black and white time-lapse sequence showing the variation of RS Puppis, a phenomenon known as a light echo is visible around the star.

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    Wonder of Science (wonderofscience@mastodon.social)'s status on Sunday, 31-Dec-2023 14:52:29 JST Wonder of Science Wonder of Science

    The star RS Puppis captured by the Hubble Space Telescope. This Cepheid variable star changes brightness by almost a factor of five every 40 days, resulting in a "light echo" on the surrounding gas and dust.

    In conversation about a year ago from mastodon.social permalink
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