The sun was once personified as a god, a symbol of a perfect cosmos. The occasional detection of dark blemishes was ...

Helioseismology probes the sun's interior by analyzing the waves that travel through it, while spectroscopy reveals the ...

102 x 120 cm. (40.2 x 47.2 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

The age of the universe has a lot to do with its size—but there's more to the story.