# Hands to Light-years (hh to ly)

Source: https://www.unitconvertercalculator.com/length/hands-to-light-years/

**1 hh = 1.073912847369E-17 ly**

One hand equals approximately 1.074 x 10-17 light-years. A light-year contains about 9.311 x 1016 hands (93 quadrillion). The hand measures horse height; the light-year measures interstellar voids. These units have never intersected.

## Formula

Convert Hands to Light-years

## Conversion Table

| Hands (hh) | Light-years (ly) |
|---|---|
| 1 hh | 1.073E-17 ly |
| 100 hh | 1.07391E-15 ly |
| 10000 hh | 1.0739128E-13 ly |
| 1000000 hh | 1.073912847E-11 ly |
| 100000000 hh | 1.07391284736E-9 ly |
| 10000000000 hh | 1.073912847369E-7 ly |
| 1000000000000 hh | 1.073912847369E-5 ly |
| 100000000000000 hh | 0.001073912847369 ly |
| 10000000000000000 hh | 0.1073912847369 ly |

## Units

### Hand (hh)

Exactly 4 inches (10.16 cm). The standard unit for measuring the height of horses, measured from the ground to the withers.

### Light-year (ly)

The distance light travels in one Julian year (365.25 days) in vacuum. Exactly 9,460,730,472,580,800 meters. Used for interstellar distances.

## Background

The nearest star at 4.24 light-years is about 3.948 x 1017 hands away. A 16-hand horse is 1.718 x 10-16 light-years tall. Even stacking every horse on Earth would not approach a millionth of a light-year.

## Good to Know

If a horse could gallop at the speed of light (it cannot), it would cover about 93 quadrillion of its own height-units per year. Horses are fast, but not that fast.

## FAQ

### How many light-years is 1 hand?

One hand equals approximately 1.074 x 10-17 light-years.

### How many hands are in 1 light-year?

One light-year contains approximately 9.311 x 1016 hands (about 93 quadrillion).

### Is this conversion ever used?

Never. Horse height and stellar distances exist in completely separate measurement domains.

## Non-Frequently Asked Questions

### How far would a horse need to gallop to cover a light-year?

A light-year is about 9.311 x 1016 hands. At 16 hands per horse, that is about 5.82 x 1015 horses stacked (5.8 quadrillion). At racing speed (60 km/h), galloping 1 light-year would take about 15.8 billion years. The universe is 13.8 billion years old. Horses cannot outrun cosmology.

### Is horseback the worst way to reach a star?

At 60 km/h, reaching Alpha Centauri (4.24 light-years) takes about 67 billion years by horse. Walking (5 km/h) takes 805 billion years. So horseback is 12 times faster than walking but still cosmologically useless. The horse provides comfort, not speed, on interstellar journeys.

### How many hands per photon?

A photon has no physical size (it is a point particle). It travels 1 hand (10.16 cm) in about 0.339 nanoseconds. In the time a horse completes one stride (about 0.4 seconds), light travels about 120 million hands. Light is not measured in hands, but if it were, it would be embarrassingly fast.

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## See Also

- [Light-years to Hands](https://www.unitconvertercalculator.com/length/light-years-to-hands/)