|May||13||All night||Comet C/2017 PANSTARRS at perihelion|
|To use the chart: hold it so the direction you are facing is at the bottom, the lower half of the chart shows the sky in front of you and the centre of the chart is the region directly overhead.|
When the moon is partially illuminated it is a great time to view its surface features. The moon has a mixture of flat plains called seas (so called because ancient astronomers thought that was exactly what they were, large seas or oceans of water) which are large regions of ancient volcanic lava, mountains, valleys and craters. Here is an image taken from guernsey on 1st May showing some of the lunar features. These features are easy to see with a pair of binoculars or a small telescope.
If you look to the west you will also see the planet Venus which exhibits phases in the same way the moon does. The full cycle from full to new to full again takes 584 days (called the synodic period), for the moon this is 29.5 days.