The double asteroid 90 Antiope has come into sharp new detail, thanks to observations from the European Space Agency's Very Large Telescope and other smaller telescopes, which spied on the pair as it waltzed around the asteroid belt between Mars and Jupiter. According to the new analysis, the objects are roughly equal in size, egg-shaped and spin at the same rate that they orbit one another, continually presenting one another with the same face in a process called tidal locking.