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PORTLAND, Maine (NEWS CENTER) -- Tuesday night. The sun, the earth and Mars will arrange in a nearly perfect line, making Mars very prominent in the night sky.

It's called Mars opposition, and experts say if skies are clear Mars will be bright enough to see, even if you live in a densely populated area with a lot of light pollution like downtown Portland.

Edward Gleason, astronomer and manager of the Southworth Planetarium, says Mars opposition happens about once every two years. He says even though the alignment happens Tuesday night, Mars will be prominent in the night sky for most of April. It will appear to be about the size of a star, with a reddish color, and will shine brighter than the brightest stars in the sky.

There will be more to watch for next week. On April 14th, Mars will be closest to earth. That same night, there will be a full lunar eclipse.

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