| | September 11
An Explosive Start for Titan's Lakes? | | | |
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 | | | Artist's concept of a lake at the north pole of Saturn's large moon Titan. This image illustrates the raised rims and rampart-like features seen by NASA's Cassini spacecraft around some Titan lakes. Image via NASA/JPL-Caltech. Read more. | | |
| | An explosive start for Titan's lakes? | | | Here's a wild scenario. You know the lakes on Titan, the ones filled with liquid methane, not water? Some are surrounded by steep rims. A new study suggests these features might have been caused by underground explosions of warming nitrogen. The explosions may have created some of Titan's lake basins. Read more. | | | | | | | | | |
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|  | | | Tonight … Watch for the legendary green flash | | If want to look for the green flash, be sure to wait until the last moment before the sun disappears. Otherwise, you might harm your eyes. Photo by Jim Grant. Read more. | | | | | |
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 | | | A corona around the sun | | View at EarthSky Community Photos. | This September 8 photo is from EarthSky friend Rocki Shore of New York, New York. It's what's called a solar corona. This sky phenomenon is much smaller than the 22-degree halo you sometimes see around the sun or moon. You need to be careful when catching it. Even though there are clouds up there, the sun's brightness can harm your eyes, or your camera. To view a corona, or capture one on film, consider putting the sun itself behind an obscuring lamppost or the side of a building. Read more about coronas from Les Cowley of the great website Atmospheric Optics. | | |
