Guided sky tours
Short stories told on the live sky map. Each step flies the map to a real object and explains it in a few sentences, with a picture where it helps. Use the arrow keys or the buttons to move on; leave whenever you like and the map stays where it is. Good for a first visit, and for a classroom.
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The life and death of stars
From a glowing cloud of gas to a white dwarf, a pulsar or a black hole: a star's whole life in nine stops.
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Messengers from the sky
Light of every kind, ghostly neutrinos and ripples in space itself: the different ways the universe sends us news.
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Gravitational waves
Einstein's ripples in space: how pulsars proved them, how LIGO hears them, and where they come from.
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Pulsars and their glitches
Spinning neutron stars that tick like clocks, then suddenly speed up: lighthouses, glitches, black widows and magnetars.
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Cosmic oddities
A star that dims for no clear reason, a flash that shook Earth's sky, a perfect ring and one quasar seen four times.
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Our cosmic address
From the middle of the Milky Way out to our supercluster and the first quasar ever found.