Το ανάλημμα δεν είναι μόνο αντέρεισμα. Στην αστρονομία, είναι η καμπύλη, το 8, που σχηματίζεται από τις διαδοχικές θέσεις ενός ουράνιου σώματος όπως παρατηρείται από το ίδιο σημείο κατά τη διάρκεια ενός έτους.
Να τα πει καλύτερα η Wiki:
In astronomy, an analemma (IPA: /ˌænəˈlɛmə/, Latin for the pedestal of a sundial) is a curve representing the angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body (usually the Earth). For instance, knowing that Earth's average solar day is almost exactly 24 hours, an analemma can be traced by plotting the position of the Sun as viewed from a fixed position on Earth at the same time every day for an entire year. The resulting curve resembles a figure of eight. This curve is commonly printed on globes. It is possible, though challenging, to "photograph" the analemma, by leaving the camera in a fixed position for an entire year and snapping images on 24-hour intervals (or some multiple thereof).
Στο astronomia.gr (και όχι μόνο) χρειάζεται προς το παρόν μια διορθωσούλα (*ανάλλημα > ανάλημμα).
http://www.astronomia.gr/wiki/index.php?title=Ανάλλημα
Να τα πει καλύτερα η Wiki:
In astronomy, an analemma (IPA: /ˌænəˈlɛmə/, Latin for the pedestal of a sundial) is a curve representing the angular offset of a celestial body (usually the Sun) from its mean position on the celestial sphere as viewed from another celestial body (usually the Earth). For instance, knowing that Earth's average solar day is almost exactly 24 hours, an analemma can be traced by plotting the position of the Sun as viewed from a fixed position on Earth at the same time every day for an entire year. The resulting curve resembles a figure of eight. This curve is commonly printed on globes. It is possible, though challenging, to "photograph" the analemma, by leaving the camera in a fixed position for an entire year and snapping images on 24-hour intervals (or some multiple thereof).
Στο astronomia.gr (και όχι μόνο) χρειάζεται προς το παρόν μια διορθωσούλα (*ανάλλημα > ανάλημμα).
http://www.astronomia.gr/wiki/index.php?title=Ανάλλημα