Mars can be in the night sky tonight, and will be for the next week.
It's orbit currently places it on opposite side of the sun form the earth, making it highly illuminated and visible to the naked eye. NASA's Hubble space telescope has been taking advantage of the opportunity, and has taken many new and amazing pictures of the red planet.
To add to the excitement, nearly all of the other planets are going to be view-able as well, with the exception of Venus.
However, for the most of them, a telescope is going to be required. Even so, it's rare that Saturn, Jupiter, Mars, and the Moon are all within our view at the same time.
For star gazers, moments like these don't come around very often. With the use of viewing aides like high powered telescoped, amazing sights can be seen.
For example the polar ice caps on mars, which are made of not just frozen water, but frozen carbon dioxide, more commonly referred to as dry ice. Even large, dormant martian volcanoes will be on display.
If you don't own or have access to a large telescope, but would like to see these heavenly bodies for your self, seek out the closest planetarium to you. Many of them are planning special events in honor of the 4th planets appearance, and will be aiming their telescopes in it's direction for all to enjoy.
If you are in the UK you can find the closest planetarium here: http://planetaria.org.uk/find-a- planetarium/