This artistic impression depicts our Solar System neighbour Venus, where scientists have confirmed ... [+] the detection of phosphine molecules.ESO/M. Kornmesser & NASA/JPL/CalEach Monday, I pick out North Americas celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern latitudes). Check my main feed for more in-depth articles on stargazing, astronomy, eclipses and more.The Night Sky This Week: Feb. 17-23, 2025From post-sunset views of a brilliant Venus to the moon rising alongside the rival of Mars, heres everything you need to know about stargazing and astronomy this week:Monday, Feb. 17: Venus At Its BrightestVenus will be the brightest it gets above the western horizon after sunset. Venus has been shrinking to a crescent as it gets closer to Earth, and today, just 23% of it is lit. Despite thatand because of both its closeness and its reflective cloud coverit will today shine at a brilliant magnitude of -4.6.Thursday, Feb. 20: Last Quarter MoonToday, we will see a Last-Quarter (or Third-Quarter) Moon, which will appear half-illuminated and rise around midnight. The moons rising and setting times shift later by about 50 minutes each night, which means this weekend will feature moonless nights. We're about to enter a fine period for stargazing.Thursday, Feb. 21: Waning Gibbous Moon, Antares And Paikauhale StellariumThursday, Feb. 21: Waning Gibbous Moon, Antares And PaikauhaleLook to the southeast horizon from about 3:00 a.m. local time through dawn to see a waning gibbous moon appearing to be about half a degree from Antares, the brightest star in the constellation of Scorpius. Antares will be above the moon. If you have a keen eye, look for the hypergiant star Paikauhale below the moon. Both stars are in Scorpius.Antares is one of the largest stars astronomers know of. gettyMORE FOR YOUStar Of The Week: AntaresAntares is a red supergiant star 12 times the sun's mass, one of the biggest stars we know of. Distinctly orangey-red to the observer (primarily through binoculars) and known as the rival of Mars because of its ruddy color and because Mars passes it closely every 26 months. If you put it in the solar system, it would reach almost as far as where Jupiter orbits.The times and dates given apply to mid-northern latitudes. For the most accurate location-specific information, consult online planetariums like Stellarium.Wishing you clear skies and wide eyes.