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| Scared yet? 2018 has 2 Friday 13ths | | The 1st of this year's 2 Friday the 13ths falls on April 13, 2018. It comes exactly 13 weeks before 2018's second Friday the 13th, in July. | | | Flyover of Jupiter’s north pole in infrared | | See what scientists saw this week at a meeting in Vienna. It's a 3-D fly-around of Jupiter's north pole, showing its central cyclone and the 8 smaller cyclones encircling it. | | | | | | | |
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| The EarthSky Store | | Help us keep presenting your world, and cosmos, to you. Plus get some cool astronomy swag while doing so! | | | | | |
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| | | In infrared, Io appears alive with volcanos | Io, a world of volcanos, shown in infrared via the Juno spacecraft (NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM). Image processed by Roman Tkachenko. | | | | |
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| | Tonight … Meet M13, the Great Cluster in Hercules | The heart of M13, aka the Great Cluster in Hercules, a globular star cluster and one of our Milky Way galaxy’s oldest inhabitants. This image was acquired by the Advanced Camera for Surveys on the Hubble Space Telescope. | | |