Happy Fourth of July! The impactor has hit Comet Tempel 1. Here are a couple of initial fuzzy screenshots from my rather jaggy NASA TV feed:

The left photo is from the flyby craft mere seconds after impact, and the right photo is from the impactor craft just minutes before it hit. Here are better images from SpaceflightNow.

Now, the flyby craft is in “shield mode” as it passes through the comet’s coma, facing its cameras away from the blast of icy particles surrounding the comet nucleus. After it gets past that, it turns towards ground zero on the comet surface and gets the highest resolution photos of the impact yet. So far, the JPL people are saying that the impact is coming out bigger and brighter than any of them expected.

More links:

• SpaceflightNow’s Deep Impact mission status updates.
• Space.com’s Deep Impact section.
• The Planetary Society’s Deep Impact section.
• CNN Deep Impact story.