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Houston, Texas (KPRC/CNN) -- Pictures posted on Twitter earlier this week show something floating through the skies over the Houston area.

In one, a circular "thing" appears to hover. In another, it appears in front of impressive clouds. In yet another, the circle appears to stand on its side with an impressive light show.

You can find a lot of things flying through the halls of the Houston Museum of Natural Science, but a real answer to just what appears in these Twitter pictures is a mystery.

"I think the trick in UFO's is figuring out what else they could be," says Dr. Carolyn Sumners, vice president for Astronomy at the Houston Museum of Natural Science. "It's easy to say that could be the aliens."

Dr. Sumners investigates and is writing a show about UFO's.

"If it's a real object and it looks like it is -- the more people who see it in different directions, the more likely we are to figure out where it is, what it is and see if we can explain it," she explains.

However, Sumner says all the bad weather the area had on Monday night could have something to do with everything people captured on their phones.

"All the way back to recorded history, there are going to be things we can't explain. That's what makes it exciting," Sumner says.

Pictures posted on Twitter earlier this week show something floating through the skies over the Houston area. KPRC/CNN

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