... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... Comet ISON fizzles as it rounds the Sun . ... This image from NASA's Solar Dynamics Observatory shows the sun, but no Comet ISON was seen. ... These images from NASA's Solar Terrestrial Relations Observatory and the ESA/NASA Solar and Heliospheric Observatory show Comet ISON growing dim as it made the journey around the sun. ... Only registered members of Astronomy.com are allowed to comment on this article. ...