ggsky is an extension for ggplot2 to draw sky maps with:
-
galactic coordinates (
coord_galactic()) -
equatorial coordinates (
coord_equatorial())
It includes custom coordinate systems and helper scales for longitude/latitude labels.
From GitHub:
#install.packages("ggsky")
library(ggsky)library(ggplot2)
#> Warning: package 'ggplot2' was built under R version 4.5.2
theme_set(theme_light())
N <- 100
df1 <- data.frame(
x = runif(N, 0, 360),
y = runif(N, -90, 90)
)
ggplot(df1, aes(x, y)) +
geom_point() +
coord_galactic() +
labs(title = "Galactic coordinate system")
ggplot(df1, aes(x, y)) +
geom_point() +
labs(title = "Equatorial coordinate system") +
coord_equatorial()