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17 March 2019
Top priority for ENV and Mastcam is to record a rare solar transit by Deimos (the smaller of the two martian moons) on sol 2350. This is similar to a lunar eclipse here on Earth; however, as Deimos is very small (radius of 6 km), it will not block out the Sun but appear as a dark spot on the solar disk.
11 May 2012
You may have heard all the excitement last weekend about the so-called “supermoon”. The gist of it is that the moon’s orbit is not perfectly circular, so its distance from the earth varies slightly. But all the talk of the “SuperMoon” got me thinking and I realized that we were missing a teachable moment. No, the moon being at perihelion is not a big deal, but our Moon is pretty “super”. Let me show you why: