World Science Festival

Journeys to the stars and intriguing pursuits on Earth are among the topics to be explored as the festival winds up this weekend. Events include “Space Exploration: Reaching New Heights,” a daylong program on Friday and Saturday at Pier 86, outside the Intrepid Sea, Air & Space Museum, where children can investigate infrared cameras, make seltzer-powered rockets and interact with NASA scientists. All three days, the space-obsessed can also visit the NASA Orbit Pavilion, a huge interactive and data-filled sculpture at Gould Plaza at New York University. “Night Lights, Big City,” May 30 from 7 to 11 p.m. at Pier 1 in Brooklyn Bridge Park, offers a chance to observe constellations (telescopes will be provided), talk to astronomers and meet astronauts. “Cool Jobs,” on May 30 at 2 p.m. at the Skirball Center for the Performing Arts, gathers a wildlife handler, an astronaut, a marine biologist and others to discuss their careers. “Science and Storytime,” May 31 from 1 to 4 p.m. at the N.Y.U. Kimmel Center, features authors reading from, and signing, children’s books on science. “What Is Sleep?,” May 31 at 1 p.m. at the Skirball Center, seeks to answer that provocative question. Finally, the Ultimate Science Street Fair, on May 31 from 10 a.m. to 6 p.m. in Washington Square Park, Greenwich Village, delivers an entire day of science exhibits and activities. Schedule and details are at http://ift.tt/17cYvnz; many events are free.