Explore a dimension
Time,
in perspective.
52 useful quantities, from fleeting instants to deep time.
52 quantities, organised by scale.
No matches here. Try the main search to explore your own quantity.
01 / 9 discoveries
Fleeting instants
02 / 7 discoveries
In a blink
03 / 12 discoveries
A day in the life
04 / 14 discoveries
Years & lifetimes
05 / 5 discoveries
Human history
06 / 5 discoveries
Deep time
There’s always another scale
Follow your curiosity.
SpaceEarth12,740 kmEarth is the rocky planet on which we live and the third planet from the Sun.
SpaceEarth–Sun distance1 AUThe Earth–Sun distance, or astronomical unit, is the standard measure of separation between Earth and the Sun used in astronomy.
SpaceObservable universe28.21 GpcThe observable universe is the region from which light or other signals have had time to reach us since the early universe.
Fundamental physicsPlanck length1.616 × 10⁻³⁵ mThe Planck length is a scale formed from fundamental physical constants.
TimePlanck time5.391 × 10⁻⁴⁴ sPlanck time is the theoretical shortest meaningful interval of time, defined using fundamental physical constants.TimeAtomic-scale transition1 fsAn atomic-scale transition is a rapid change in the energy state of an atom, often occurring in extremely short intervals.TimeCamera flash1 msA camera flash is a brief, intense burst of light used to illuminate a scene for photography.TimeBlink of an eye150 msA blink of an eye is the quick closing and opening of the eyelid, usually happening involuntarily.