Four‑Planet Pre‑Dawn Parade

Mercury, Mars, Saturn, and Neptune are bunching together low in the eastern sky before sunrise in a brief April 2026 planetary alignment. (starwalk.space) The tightest viewing window runs from about April 16 to April 23, with April 18 to April 20 listed as the best mornings in many locations. Mercury, Mars, and Saturn can be seen without a telescope under clear skies, while Neptune is too faint for the naked eye in bright dawn. (starwalk.space) A planetary alignment is a line-of-sight effect, not a straight line in space: the planets appear grouped because they all track near the ecliptic, the same sky path followed by the Sun. In this case, the cluster sits very low above the eastern horizon, so haze and twilight can erase the dimmer targets fast. (starwalk.space) For viewers in the Northern Hemisphere, the timing is tight. National Geographic says to look about 30 minutes before sunrise, and to stop using binoculars or a telescope once the Sun begins to rise. (nationalgeographic.com) The geometry changes from morning to morning. National Geographic reports the visible trio shifts between a diagonal line and a compact triangle from April 16 to April 21, with the planets appearing only two to three degrees apart at their closest. (nationalgeographic.com) The view is better farther south. Star Walk says Southern Hemisphere observers get the easiest look, while many Northern Hemisphere locations see the planets sitting very low in bright twilight; EarthSky said some northern latitudes might miss the grouping entirely on April 20. (starwalk.space) (earthsky.org) Mercury is expected to be the easiest planet to pick out in the dawn glow. EarthSky said it was the brightest of the three naked-eye planets in the April 20 morning grouping seen from the Southern Hemisphere, with Mars showing a redder tint and Saturn sitting lower. (earthsky.org) The practical advice is simple: find a flat, dark eastern horizon, arrive early, and check a sky map for your exact sunrise time and planet heights. If the horizon is blocked by buildings, hills, or cloud, this alignment can be over before the sky is fully bright. (starwalk.space) (nationalgeographic.com) This is not a one-minute event and not a once-in-history one either, but it is a narrow morning target. The planets stay grouped for several dawns, then spread apart again as April ends. (starwalk.space)