... Diffraction Spikes: When Stars Look Like Crosses . ... Unusual appendages around bright stars are commonplace, but never seem to be mentioned. ... First, a telescope brings starlight falling over a large area to a small area. ... In the Center of the Trapezium . ... Barringer Crater on Earth . ... What happens when a meteor hits the ground? ... Uranus: The Tilted Planet . ... This picture was snapped by the Voyager 2 spacecraft in 1986 - the only spacecraft ever to visit Uranus. ...