The NASA photo appears to show a shadowy spirit gliding across the surface of the planet.
YouTube user UFOovni2012 spotted the female ghost on the Nasa-released image last month.
"The woman seems to have breasts," UFO Sightings Daily.com wrote.
"Indicated by the shadow on its chest. "We also see two arms that are lighter in colour and what looks like a head with long hair.
The site also claims the figure was watching over the Mars rover from a distance.
The search for alien life was given new impetus after NASA announced the discovery of Earth's cousin – Kepler-452b.
John Grunsfeld, associate administrator of NASA’s Science Mission Directorate at the agency’s headquarters in Washington, said: "On the 20th anniversary year of the discovery that proved other suns host planets, the Kepler exoplanet explorer has discovered a planet and star which most closely resemble the
Earth and our Sun.
“This exciting result brings us one step closer to finding an Earth 2."
John Jenkins, Kepler data analysis lead at NASA's Ames Research Center in Moffett Field, California, added: "It has spent six billion years in the habitable zone - longer than the age of Earth - and a considerable time for life to arise somewhere on the earth or in the ocean.
"There is a better than even chance it would be rocky.
Read Full Story: Daily Star UK