We do not use latitude and longitude in the sky. Co-ordinates are given as right ascension and declination. These give positions relative to the First Point of Aries, where the Sun crosses the celestial equator at the vernal equinox, and to the celestial equator. A constellation covers quite a large area of sky so must be given a range of co-ordinates. For Aquila these are RA 18 hours 41 min 18.2958 s to 20 hours 38 min 23.7231 s, and declination 18.6882229 degrees to minus 11.8664360 degrees.
Well, a pair of coordinates defines a single point, so you'd never talk about the "latitude and longitude" of a whole continent. But we see what you're getting at. The Prime Meridian and the Equator both cross Africa, so there is African territory in the northern, southern, eastern and western Hemispheres, and there are points in Africa with every possible permutation of coordinate directions: -- North lat / East lon -- North lat / West lon -- South lat / East lon -- South lat / West lon. Africa is the only continent for which this is true.
South America
15S 115W is deep in the South Pacific Ocean, 900 miles north of Easter Island, 1800 miles SW of the Galapagos islands, 1200 miles NE of Pitcairn Island.
Right ascension (abbrev. RA; symbol α) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.RA is the celestial equivalent of terrestrial longitude.Scorpius can be located at RA of 16 hrs. 53 min. 15 sec.
16h 53m 15s, −30° 44′ 12″
The coordinates 15S 15E correspond to Botswana, a country located in southern Africa.
The coordinates 15S, 75W represent a location in Peru, in or near Poroma on the Panamericana Sur.
15s-15 = 0
We do not use latitude and longitude in the sky. Co-ordinates are given as right ascension and declination. These give positions relative to the First Point of Aries, where the Sun crosses the celestial equator at the vernal equinox, and to the celestial equator. A constellation covers quite a large area of sky so must be given a range of co-ordinates. For Aquila these are RA 18 hours 41 min 18.2958 s to 20 hours 38 min 23.7231 s, and declination 18.6882229 degrees to minus 11.8664360 degrees.
Well, a pair of coordinates defines a single point, so you'd never talk about the "latitude and longitude" of a whole continent. But we see what you're getting at. The Prime Meridian and the Equator both cross Africa, so there is African territory in the northern, southern, eastern and western Hemispheres, and there are points in Africa with every possible permutation of coordinate directions: -- North lat / East lon -- North lat / West lon -- South lat / East lon -- South lat / West lon. Africa is the only continent for which this is true.
The coordinates 20S, 135E correspond to a location in the country of Australia.
South America
12r - 15s - r + 3s = 11r -12s
15s=58.5 s=58.5/15 s =3.9
678
45