Once the sun goes down, take a look to the west to see a quite spectacular sight.
Lower in the sky you will see Venus as a bright white light. It is the third brightest object visible at any time (after only the sun and the moon).
A little above Venus you’ll see the 4th brightest object in the sky – Jupiter. The image below (a screen-grab from Stellarium) shows the scene very well.
Stellarium is a freely downloadable package that will show all objects in the sky in read-time. There are versions of this open-source planetarium for Windows, Mac OSX and Linux.
Higher still is Mars, which was at its closest point to Earth a few weeks ago, and is still exceptionally bright.
The planets will stay in this approximate configuration for the next few days/weeks so keep an eye open to see how they move against the background stars.
Oh, and the easiest way to identify an object as a planet, rather than a star – planets don’t twinkle. Readers are welcome to speculate as to why this is in the comments section below. The other fun-fact – Venus can never be more than 47 degrees away from the sun. Why is that?
The only visible planet not currently on display in the evening is Mercury – currently it is setting before the sun and rising beside it (due to the oddities of spherical geometry).