Relative physical sizes of the Sun to the three components of the Alpha Centauri system. Direct measurements of the sizes of A and B have been obtained with VLTI http://www.eso.org/public/unitedkingdom/news/eso0307/
The #GlowingEye of #NGC6751 - The Hubble telescope has spied a giant celestial 'eye', known as planetary nebula NGC 6751. The Hubble Heritage Project is releasing this picture to commemorate the Hubble telescope's tenth anniversary. Glowing in the constellation Aquila, the nebula is a cloud of gas ejected several thousand years ago from the hot star visible in its center.