A rare celestial event will occur tomorrow, with Venus, Saturn, Jupiter, and Mars aligning and visible to the naked eye.

Sometimes, it's easy to forget that we're spoiled with one of the best observatories in our solar system, and it's called Earth. In fact, this Tuesday (21 January), six planets will line up in the night sky above us, for all to see.

Venus, Saturn, Jupiter and Mars will appear to line up and be bright enough to see with the naked eye in the first few hours after dark. This weekend, Venus and Saturn get especially cozy.

On the evening of February 28, stargazers will witness a rare celestial event: an alignment of seven planets visible

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Mars, Jupiter, Uranus, Neptune, Venus and Saturn will align in the sky on Jan. 21, resulting in both astronomical and astrological significance in the cosmos

Venus and Saturn will be in conjunction this weekend, appearing side by side in the night sky during January's post-sunset "planet parade."

Mars will be making its closest approach to Earth in two years, and thus, the mighty red planet, named for the god of war himself, will appear brighter, bigger, and bolder in the night sky. This Martian exclamation point will further amplify the experience of the alignment.

Since the middle of the month, four of the five brightest planets in the night sky have been visible after sunset and will continue to "line up" through the end of the month. The best chance to see these four planets and the two hiding in the dark (Neptune and Uranus) will occur around the 21st and 22nd in the southern sky after sunset,

Both Venus and Saturn will be in the Aquarius constellation, the water bearer, during their close approach. To help spot it, viewers should look towards the south in the evening sky, using the bright star Fomalhaut in the nearby Piscis Austrinus constellation as a guide to locate Aquarius.

Jupiter's Great Red Spot storm, which usually appears dark-red, can be seen shining a lurid blue color in an ultraviolet image of the planet.