Today in the history of astronomy, we meet our first interstellar visitor. vist.ly/5n2th

Sky Today: October 19 The Southern Fish is home to the bright luminary Fomalhaut, a lovely young star that shines brightly in the evening sky. Image Credit: Stellarium/USGS/Celestia/Clementine Read more: vist.ly/5nycx

Astronomers can use lensing to learn about everything from the makeup of the universe to the nature of extrasolar planets. vist.ly/5nwjn

Sky Today: October 18 Saturn’s small moon Tethys makes another transit across the disk along with its shadow; several other moons are observable as well. Image Credit: Alison Klesman (via TheSkyX) Read more: vist.ly/5nvqj

Integrity served as a deep-space testbed for technology that could aid cancer patients, serve remote clinics, and supercharge the internet. vist.ly/5nv6u

Proposals are submitted annually by scientists who wish to use these facilities, and are reviewed by the Telescope Allocation Committee. vist.ly/5ntrx

Sky Today: October 17 The Wild Duck Cluster is flying through the nighttime sky, a great object to check out during lengthening autumn evenings. Image Credit: Stephen Rahn (Flickr, CC0 1.0) Read more: vist.ly/5ns2k

JAXA’s MMX mission will spend three years studying the martian moon before landing to collect soil. vist.ly/5nrjd

Today in the history of astronomy, 50 years of weather-monitoring kicks off. vist.ly/5npnz

Sky This Week: October 16 to 23 Meteors streak past the stars as the First Quarter Moon shines and Iapetus reaches superior conjunction in the sky this week Image credit: Jim Vajda (Flickr, CC BY 2.0) Read more: vist.ly/5nn4m

Today in the history of astronomy, the NASA/ESA mission to the outer solar system lifts off. vist.ly/5njma

Astronomers suspect NGC 3137 and its large spiral neighbor, NGC 3175, mimic the Milky Way and Andromeda galaxies in our Local Group. Image credit: ESA/Hubble & NASA, D. Thilker and the PHANGS-HST Team Read more: vist.ly/5njkc

Sky Today: October 15 This unique pair of craters was created by just one impactor that skipped along the lunar surface, leaving a cometlike tail of ejecta. Image Credit: Consolidated Lunar Atlas/UA/LPL Read more: vist.ly/5ngds

Sky Today: October 14 Two jovian moons cross each other’s paths from our point of view, appearing to merge in the telescope eyepiece. Image Credit: Stellarium/James Hastings-Trew/NASA Cassini/Oleg Pluton/John van Vliet/PDS (CC-BY-SA) Read more: vist.ly/5nbdm

Astronomers can use lensing to learn about everything from the makeup of the universe to the nature of extrasolar planets. vist.ly/5na47

Integrity served as a deep-space testbed for technology that could aid cancer patients, serve remote clinics, and supercharge the internet. vist.ly/5n8ga

Discover this year's most exciting new astronomy products selected by Astronomy's contributing editor and gear guru. vist.ly/5n7dp

Sky Today: October 13 The fourth asteroid discovered reaches opposition in Cetus the Whale, visible even under light-polluted skies. Image Credit: Astronomy: Roen Kelly Read more: vist.ly/5n5y6

Sky Today: October 12 The planet Mercury stands 25° east of the Sun. View the solar system’s smallest planet, along with the crescent Moon, in the evening sky. Image Credit: Astronomy: Roen Kelly Read more: vist.ly/5mym7

Choosing full cutoff fixtures and the appropriate amount of outdoor lighting is more important than the specific light source you use. vist.ly/5mxf8