Jupiter reaches opposition on Saturday, January 10, making it the brightest and largest it will appear all year. As Earth lines up between Jupiter and the sun, the gas giant will glow at magnitude -2.7, outshining most objects except the moon and Venus. Visible in the constellation Gemini, Jupiter can be seen from dusk through dawn for much of January. The planet is closest to Earth just before opposition, offering prime viewing conditions for stargazers.