姓名
DateTime :: Julian-提供例程以使用天文朱利安日期（有时称为朱利安天数）
概要
use DateTime ::Julian;
my $jd = nnnn . nnnn; # Julian date for 20
my $utc = DateTime ::Julian . new : : juliandate($jd);
say $utc . j2000;
say $utc . jcent;
my $lon = -86.234 ; # local observer's lat
SlicerAstro
Astronomy (HI) extension for
Upcoming HI (neutral Hydrogen) surveys will deliver large datasets, and automated processing using the full 3D information (two positional dimensions and one spectral dimension) to find and characterize HI ob
