Look closely at this Mercury crater – it is smiling at you! (Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)

For early birds, the next week or so is a good time to try to spot Mercury low in the eastern dawn twilight. Look about 40-60 minutes before sunrise. Mercury will appear close to reddish Mars and bright Jupiter.

If observing Mercury has you fantasizing about taking a trip there, you might consider what you should pack. Four possible items:

1)      A really good spacesuit. The high temperature on Mercury can reach 800 degrees Fahrenheit.

2)      Long underwear. Although you would be absolutely scorched on the side of Mercury facing the Sun, Mercury doesn’t have a thick atmosphere to retain that heat. So the temperature on the nighttime side can drop to way, way below freezing.

3)      Ice skates. The MESSENGER mission has found compelling evidence that there is abundant water ice in permanently shadowed craters at Mercury’s poles.

4)      Birthday candles. If you take a vacation that’s long enough, you’ll celebrate a birthday on Mercury. This speedy planet completes a trip around the Sun much faster than Earth does. One year on Mercury is the equivalent of only 88 days on Earth.

You can learn more about Mercury at NASA’s Solar System Exploration site.

Since you can’t actually vacation on Mercury, you’ll have to settle for seeing the planet from Earth.