Calendar Categories Astronomy Lunar Meteor Shower Solar System Terrestrial Agenda Agenda Day Month Week June – August 2019 Jun – Aug 2019 Collapse All Expand All Jun 18 Tue Mercury @ conj w/Mars (PM) Tickets Jun 18 @ 19:51 – 19:51 Sun sets : 1951 Mars sets : 2133 Mercury sets : 2135 Jun 21 Fri Summer solstice Tickets Jun 21 @ 10:54 – 10:54 Jun 30 Sun International Asteroid Day Tickets Jun 30 all-day Jul 9 Tue Saturn @ opposition Tickets Jul 9 @ 12:00 – 12:00 Aug 24 Sat Venus @ conj w/Mars (PM) Tickets Aug 24 @ 19:18 – 19:18 Sun sets : 1918 Mars sets : 1929 Venus sets : 1931 June – August 2019 Jun – Aug 2019