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Curiosity rover reached out with robotic arm and drilled into ‘Lubango’ outcrop target on Sol 1320, Apr. 23, 2016, in this photo mosaic stitched from navcam camera raw images and colorized. Lubango is located in the Stimson unit on the lower slopes of Mount Sharp inside Gale Crater. MAHLI camera inset image shows drill hole up close on Sol 1321. Credit: NASA/JPL/MSSS/Ken Kremer/kenkremer.com/Marco Di Lorenzo

This illustration shows a star surrounded by a protoplanetary disk. Material from the thick disk flows along the star’s magnetic field lines and is deposited onto the star’s surface. When material hits the star, it lights up brightly. The star’s irregular illumination allows astronomers to measure the gap between the disk and the star by using a technique called “photo-reverberation” or “light echoes.” First, astronomers look at how much time it takes for light from the star to arrive at Earth. Then, they compare that with the time it takes for light from the star to bounce off the inner edge of the disk and then arrive at Earth. That time difference is used to measure distance, as the speed of light is constant. Credit: NASA/JPL-Caltech

The Cosmic Dust Analyser on the international Cassini spacecraft has detected the faint but distinct signature of dust coming from outside our Solar System, from the local interstellar cloud: an almost empty bubble of gas and dust we are travelling through with a distinct direction and speed. This graphic summarises the location of Saturn, and the Solar System, with respect to the local interstellar cloud, and our place in the Milky Way galaxy. Credit: ESA

Workers representing the repair system known as nucleotide excision repair (NER), repairing DNA and snakes, representing proteins that bind DNA at gene promoters, potentially preventing them from doing this. Credit: Jackie Mostek