Most of the funeral will be celebrated in Latin, and there will be incense and hymns and Gregorian chants. Attended by dozens of heads of state, monarchs and other dignitaries, it will be, in any case, a spectacle. And at the center of it all will be Francis’ simple coffin, on the esplanade of St. Peter’s Basilica.

Hundreds of thousands gathered in St. Peter's Square on Sunday, a day after Pope Francis' funeral, for another ceremony to honour him on the second of nine official days of mourning for the global Catholic Church.

Euclid is a six-year mission by the European Space Agency (ESA) aimed at mapping the dark universe by analyzing the positions of galaxies and capturing images of dark matter through gravitational lensing distortions of distant galaxies.

May 7 marks the beginning of the conclave to elect his successor. After a week of global mourning for Pope Francis, who died on April 21 at age 88, he was laid to rest at the Papal Basilica of St. Mary Major in Rome.