Convert 21 Light Years to Astronomical Units

How far is 21 light years? How long is 21 light years in astronomical units? 21 ly to AU conversion.

Amount

From

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21 Light Years ≈

1,328,062.6 Astronomical Units

result rounded

Decimal places

Result in Plain English

21 light years is equal to about 1.33 million astronomical units.

In Scientific Notation

21 light years

= 2.1 x 10¹ light years

≈ 1.32806 x 10⁶ astronomical units

Light Years

A light year is the distance that light travels in one year. The year used by the International Astronomical Union is 365.25 days. A light year is defined as exactly 9,460,730,472,580.8 kilometers.

Astronomical Units

An astronomical unit is the average distance between the Earth and the Sun. Estimates of this distance have varied over time. It is now defined as exactly 149,597,870.7 kilometers.

Light Years to Astronomical Units Conversions

results may be rounded

Light years	AU
21.00	1,328,100
21.01	1,328,700
21.02	1,329,300
21.03	1,330,000
21.04	1,330,600
21.05	1,331,200
21.06	1,331,900
21.07	1,332,500
21.08	1,333,100
21.09	1,333,800
21.10	1,334,400
21.11	1,335,000
21.12	1,335,700
21.13	1,336,300
21.14	1,336,900
21.15	1,337,500
21.16	1,338,200
21.17	1,338,800
21.18	1,339,400
21.19	1,340,100
21.20	1,340,700
21.21	1,341,300
21.22	1,342,000
21.23	1,342,600
21.24	1,343,200
21.25	1,343,900
21.26	1,344,500
21.27	1,345,100
21.28	1,345,800
21.29	1,346,400
21.30	1,347,000
21.31	1,347,700
21.32	1,348,300
21.33	1,348,900

Light years	AU
21.34	1,349,600
21.35	1,350,200
21.36	1,350,800
21.37	1,351,500
21.38	1,352,100
21.39	1,352,700
21.40	1,353,400
21.41	1,354,000
21.42	1,354,600
21.43	1,355,300
21.44	1,355,900
21.45	1,356,500
21.46	1,357,200
21.47	1,357,800
21.48	1,358,400
21.49	1,359,100
21.50	1,359,700
21.51	1,360,300
21.52	1,360,900
21.53	1,361,600
21.54	1,362,200
21.55	1,362,800
21.56	1,363,500
21.57	1,364,100
21.58	1,364,700
21.59	1,365,400
21.60	1,366,000
21.61	1,366,600
21.62	1,367,300
21.63	1,367,900
21.64	1,368,500
21.65	1,369,200
21.66	1,369,800
21.67	1,370,400

Light years	AU
21.68	1,371,100
21.69	1,371,700
21.70	1,372,300
21.71	1,373,000
21.72	1,373,600
21.73	1,374,200
21.74	1,374,900
21.75	1,375,500
21.76	1,376,100
21.77	1,376,800
21.78	1,377,400
21.79	1,378,000
21.80	1,378,700
21.81	1,379,300
21.82	1,379,900
21.83	1,380,600
21.84	1,381,200
21.85	1,381,800
21.86	1,382,400
21.87	1,383,100
21.88	1,383,700
21.89	1,384,300
21.90	1,385,000
21.91	1,385,600
21.92	1,386,200
21.93	1,386,900
21.94	1,387,500
21.95	1,388,100
21.96	1,388,800
21.97	1,389,400
21.98	1,390,000
21.99	1,390,700

Convert 21 Light Years to Astronomical Units

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