A self-portrait taken by NASA's Curiosity rover on June 15, 2018. A Martian dust storm has reduced sunlight and visibility around the planet, including at the rover's location in Gale Crater.
NASA's Mars Curiosity Rover tweeted out a new image on January 23, 2018: "I'm back! Did you miss me?" The selfie is part of a fresh batch of images the rover beamed back from Mars.
Five years ago and 154 million miles away, NASA's Curiosity Mars rover successfully landed on the planet. Take a look back at what the rover has been up to these past five years, including this selfie it took on January 19, 2016.
The bright blue speck in the middle of this image is NASA's Curiosity Mars rover. The image was taken from another NASA spacecraft, Mars Reconnaissance Orbiter, which is in orbit above the planet, on June 6, 2017.
Curiosity has temperature and humidity sensors mounted on its mast. Calculations in 2015 based on Curiosity's measurements indicate that Mars could be dotted with tiny puddles of salty water at night.
The Mars rover Curiosity does a test drill on a rock dubbed "Bonanza King" to determine whether it would be a good place to dig deeper and take a sample. But after the rock shifted, the test was stopped.
Wheel tracks from Curiosity are seen on the sandy floor of a lowland area dubbed "Hidden Valley" in this image.
The rover recently encountered this iron meteorite, which NASA named "Lebanon." This find is similar in shape and luster to iron meteorites found on Mars by the previous generation of rovers. A portion of the rock was outlined by NASA scientists.
Curiosity took this nighttime photo of a hole it drilled May 5 to collect soil samples. NASA said this image combines eight exposures taken after dark on May 13.
This view of the twilight sky and Martian horizon, taken by Curiosity, includes Earth as the brightest point of light in the night sky. Earth is a little left of center in the image, and our moon is just below Earth. A human observer with normal vision, if standing on Mars, could easily see Earth and the moon as two distinct, bright "evening stars."
The lower slopes of "Mount Sharp" are visible at the top of this image, taken on July 9, 2013. The turret of tools at the end of the rover's arm, including the rock-sampling drill in the lower left corner, can also be seen.
The rock on the left, called "Wopmay," was discovered by the rover Opportunity, which arrived in 2004 on a different part of Mars. Iron-bearing sulfates indicate that this rock was once in acidic waters. On the right are rocks from "Yellowknife Bay," where rover Curiosity was situated. These rocks are suggestive of water with a neutral pH, which is hospitable to life formation.
Curiosity shows the first sample of powdered rock extracted by the rover's drill. The image was taken by Curiosity's mast camera on February 20, 2013.
The rover drilled this hole, in a rock that's part of a flat outcrop researchers named "John Klein," during its first sample drilling on February 8, 2013.
Curiosity's first set of nighttime photos include this image of Martian rock illuminated by ultraviolet lights. Curiosity used the camera on its robotic arm, the Mars Hand Lens Imager, to capture the images on January 22, 2013.
A view of what NASA describes as "veined, flat-lying rock." It was selected as the first drilling site for the Mars rover.