For a split second on a clear Arizona morning, a human silhouette seemed to plunge across the blazing face of the sun. It was not a cosmic disaster or a daredevil stunt gone wrong, but an ...

Powerful flares, breathtaking views across the solar poles, and a curious solar ‘hedgehog’ are amongst the haul of spectacular images, movies and data returned by Solar Orbiter from its first close ...

From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or November at intervals of 100.5, 79, 25.5, and 79 years. During these events, Earth and the Moon ...