Like Halley’s Comet, 12P/Pons-Brooks is a so-called cryovolcanic object, meaning that its icy surface sometimes erupts as a result of heating by the sun. Last July, one such eruption took place ...

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

It may undergo another outburst today due to its biweekly combustions that occur due to its two-week cycle, where the sun hits a cryovolcanic vent on the comet’s surface every 15 days.