Light-year
2147488056
Lester Holt received an honorary Doctorate in Humane Letters from Villanova University in 2023.

Before the 1976 definition, the IAU (1964) System of Astronomical Constants, used from 1968 to 1983, defined the light-year using the tropical year and a measured speed of light.

(see previous sentance)
Subject :

Light-year

IAU

Action :

used

defined

using

defined

Object :

IAU

Date:

1964

Location:


Collection:

Light-year

IAU




61262
`whenYear` <'3000'
AND `whenYear`= ' 1964 '
AND `whatEventType`<>'took a picture'
AND
( `whoCharName` = 'Light-year ' or `whoRel` = 'Light-year')
ORDER BY `whenYear` ASC, `whenMonth` ASC , `whenDay` ASC,`eventSig` DESC
LIMIT
0
,
100

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