<P> The angular diameter of the Sun, from a distance of one light - year, is 0.03", and that of the Earth 0.0003". The angular diameter 0.03" of the Sun given above is approximately the same as that of a person at a distance of the diameter of the Earth. (1) </P> <P> This table shows the angular sizes of noteworthy celestial bodies as seen from the Earth: </P> <Table> <Tr> <Th> Celestial body </Th> <Th> Angular diameter or size </Th> <Th> Relative size </Th> </Tr> <Tr> <Td> Sun </Td> <Td> 31 ′ 31"--32 ′ 33" </Td> <Td> 30--31 times the maximum value for Venus (orange bar below) / 1891--1953" </Td> </Tr> <Tr> <Td> Moon </Td> <Td> 29 ′ 20"--34 ′ 6" </Td> <Td> 28--32.5 times the maximum value for Venus (orange bar below) / 1760--2046" </Td> </Tr> <Tr> <Td> Helix Nebula </Td> <Td> about 16 ′ by 28 ′ </Td> <Td> </Td> </Tr> <Tr> <Td> Spire in Eagle Nebula </Td> <Td> 4 ′ 40" </Td> <Td> length is 280" </Td> </Tr> <Tr> <Td> Venus </Td> <Td> 9.67"--1 ′ 3" </Td> <Td> </Td> </Tr> <Tr> <Td> Jupiter </Td> <Td> 29.80"--50.59" </Td> <Td> </Td> </Tr> <Tr> <Td> Saturn </Td> <Td> 14.50"--21.37" </Td> <Td> </Td> </Tr> <Tr> <Td> Mars </Td> <Td> 3.49"--25.13" </Td> <Td> </Td> </Tr> <Tr> <Td> Mercury </Td> <Td> 4.54"--13.02" </Td> <Td> </Td> </Tr> <Tr> <Td> Uranus </Td> <Td> 3.31"--4.08" </Td> <Td> </Td> </Tr> <Tr> <Td> Neptune </Td> <Td> 2.17"--2.37" </Td> <Td> </Td> </Tr> <Tr> <Td> Ceres </Td> <Td> 0.33"--0.84" </Td> <Td> </Td> </Tr> <Tr> <Td> Vesta </Td> <Td> 0.20"--0.64" </Td> <Td> </Td> </Tr> <Tr> <Td> Pluto </Td> <Td> 0.065"--0.116" </Td> <Td> </Td> </Tr> <Tr> <Td> "Planet Jehoshaphat" (hypothetical) </Td> <Td> 0.015"--0.18" </Td> <Td> </Td> </Tr> <Tr> <Td> R Doradus </Td> <Td> 0.052"--0.062" </Td> <Td> </Td> </Tr> <Tr> <Td> Betelgeuse </Td> <Td> 0.049"--0.060" </Td> <Td> </Td> </Tr> <Tr> <Td> Eris </Td> <Td> 0.034"--0.089" </Td> <Td> </Td> </Tr> <Tr> <Td> Alphard </Td> <Td> 0.00909" </Td> <Td> </Td> </Tr> <Tr> <Td> Alpha Centauri A </Td> <Td> 0.007" </Td> <Td> </Td> </Tr> <Tr> <Td> Canopus </Td> <Td> 0.006" </Td> <Td> </Td> </Tr> <Tr> <Td> Sirius </Td> <Td> 0.005936" </Td> <Td> </Td> </Tr> <Tr> <Td> Altair </Td> <Td> 0.003" </Td> <Td> </Td> </Tr> <Tr> <Td> Deneb </Td> <Td> 0.002" </Td> <Td> </Td> </Tr> <Tr> <Td> Proxima Centauri </Td> <Td> 0.001" </Td> <Td> </Td> </Tr> <Tr> <Td> Alnitak </Td> <Td> 0.0005" </Td> <Td> </Td> </Tr> <Tr> <Td> A star like Alnitak at a distance where the Hubble space telescope would just be able to see it </Td> <Td> 6990600000000000000 ♠ 6 × 10 arcsec </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Celestial body </Th> <Th> Angular diameter or size </Th> <Th> Relative size </Th> </Tr>

What is the moon's angular diameter in our sky