Uranus and Neptune orbit in the dim, cold depths of the outer solar system. Neptune absolutely requires a telescope to observe. While Uranus is technically bright enough to detect with good eyesight, it's quite faint and requires dark skies and precise knowledge of its location among similarly faint stars, so a telescope is recommended.

This is your final weekend to catch February’s fading 6-planet lineup or "planet alignment". Here’s what’s still visible — and what’s already gone.