Is it retrograde?
A live answer for each naked-eye planet, worked out from the ephemeris, with the backward loop drawn on both faces of the sky.
Questions people ask
Is Mercury retrograde right now?
This page answers that live, for every naked-eye planet, worked out from the ephemeris rather than a fixed calendar - retrograde windows shift from year to year, so a page that only lists past dates goes stale.
What does "retrograde" actually mean?
It is an apparent reversal: because Earth and the other planets orbit the Sun at different speeds, a planet can look like it is moving backwards against the stars for a few weeks or months, even though its real orbit never changes direction.
Why does the timeline show a bar for each planet?
Each bar marks a real retrograde window for that planet, drawn from the same live ephemeris as the answer above it - so you can see how long the current or next window lasts, not just whether one is happening today.
Is this astrology?
No. It is a real orbital-mechanics calculation (the Astronomy Engine library), the same kind of calculation used for spacecraft navigation - it reports when a planet is retrograde, not what that means for you.