Smooth Ball Found On Mars By NASA's Curiosity Rover

'Pahrump Hills' Region, Mars — A color mosaic taken by NASA's Mars Curiosity rover Mast Camera (mastcam) shows strata exposed along the margins of the valleys in the "Pahrump Hills" region on Mars in this undated handout photo courtesy of NASA. After 18 months of driving, scientists on September 11, 2014, announced that Curiosity had arrived at the base of Mount Sharp ahead of schedule, thanks to a somewhat serendipitous decision to take an alternative path that would be gentler on the rover's damaged wheels. Within two weeks, Curiosity will reach an outcrop of rock called Pahrump Hills, where the first drill samples of Mount Sharp real estate will be made. Reuters/NASA/JPL-Caltech/MSSS/

In a picture sent by National Aeronautic and Space Administration's Mars Curiosity Rover, a perfect sphere was observed. It is being assumed that it was a leftover from the time when the Red Planet was wetter.

Martian objects like the perfect sphere get people excited, reported the Washington Post. The sphere was found to be very smooth. Though the image shows the ball to appear bigger, it has been confirmed that it is only a centimetre across. The object is proof of the strange findings in Mars.

Ian O'Neill for Discovery News said that the object could be a 'concretion.' Concretions are seen on Earth but being noticed on the Red Planet is certainly surprising. It is said that when Mars had water, it formed concretions and sedimentary rock, similar to what the Earth does.

The water builds up to form rock and the process leaves behind pores. The minerals then seep down to form masses inside the rock.The concretion is formed when, due to erosion, the layers of sedimentary rock are taken away, which causes them to be round.

Pictures from the Curiosity Rover have seen many objects in the past. The objects include a thigh bone, a toy boat, an iguana, a cat and a half-human and half-goat face and most recently, a traffic light-shaped rock was seen in the same image in which the perfect sphere was observed.

According to the Web site, Microfinance Monitor, objects found on the planet usually create a lot of activity in the social media. NASA experts have to reveal the truth behind the spherical object.

Paul Scott Andersen, a blogger and freelance writer, took to the social networking site, Twitter, to share his excitement about the spherical object. He wrote:

A nice round Martian "blueberry" (concretion?) from sol 746, #Curiosity. Right side of image. pic.twitter.com/guSMJ0bsHp
— Paul Scott Anderson (@paulsanderson) September 24, 2014

The science editor of NBC Digital News, Alan Boyle, also posted a tweet. His message went like this:

Now we know the meaning behind those mysterious balls that the @MarsCuriosity rover saw: http://t.co/0PTXFYgPlZ pic.twitter.com/GE5Ybu7CX1 — Alan Boyle (@b0yle) September 26, 2014

The senior editor and planetary evangelist of the Planetary Society, Emily Lakdawalla, shared a picture on her Twitter page. A message accompanied the picture and it went like this:

Did I mention people getting excited about round balls on Mars? Here's an outcrop full of them. Plus crossbeds. pic.twitter.com/g3KyYPI8tR
— Emily Lakdawalla (@elakdawalla) September 26, 2014

The Curiosity Rover had drilled into the base of Mount Sharp earlier this week. It collected a powdered rock sample.