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blogs.esa.int
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| | | | Follow ESA's mission to Comet 67P/Churyumov-Gerasimenko | |
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www.esa.int
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| | | | Reconstructing Philae's trajectory | |
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www.esa.int
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| | | | Rosetta approaching comet | |
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thatsmaths.com
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| | At 9.01AM today, the Sun crosses the Earth's equator, marking the vernal equinox, the date when the direction of sunrise is due east and sunset due west. The Earth's axis is at right angles to the line from Sun to Earth, the Sun is directly over the equator and the lengths of day and night... |