When Mars is "in opposition," it, Earth and the sun are all in alignment. (Note: This is a diagram meant to illustrate the concept of opposition. It is not drawn to scale.)
This artist's impression shows the dust torus around a super-massive black hole. Black holes lurk at the centers of active galaxies. The jets emanating from the black hole send neutrinos hurtling into space.
ESA/NASA/the AVO project/Paolo Padovani
Asteroid Ryugu, photographed on June 26 by the Hayabusa2 spacecraft, was the Japanese mission's destination. The craft will travel alongside the asteroid for 18 months.
JAXA, University of Tokyo and collaborators
A dust storm has reduced sunlight and visibility on Mars. But NASA's Curiosity rover, seen in a self-portrait taken last week in the Gale Crater, runs on nuclear energy and is powering through.
NASA/JPL-Caltech via AP
Global map of Mars showing a growing dust storm as of June 6, 2018. The map was produced by the Mars Color Imager (MARCI) camera on NASA's Mars Reconnaissance Orbiter spacecraft.