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This module provides a large number of physical constants which are useful to astronomers. The module itself is essentially a wrapper around the ASTROCONST package of Jeremy Balin.

This module returns the sunrise/sunset for a given day.

This package accesses the Space-Track web site, http://www.space-track.org, and retrieves orbital data from this site. You must register and get a username and password before you can make use of this package, and you must abide by the site's restrictions, which include not making the data available to a third party. In addition, the celestrak method queries http://celestrak.com/ for a named data set, and then queries http://www.space-track.org/ for the orbital elements of the objects in the data set. Beginning with version 0.017, there is provision for retrieval of historical data. Nothing is exported by default, but the shell method/subroutine can be exported if you so desire. Most methods return an HTTP::Response object. See the individual method document for details. Methods which return orbital data on success add a 'Pragma: spacetrack-type = orbit' header to the HTTP::Response object if the request succeeds.

p5-Astro-SIMBAD-Client provides an object-oriented interface to SIMBAD4. The new SOAP queries are supported, with the object carrying default output type and output format, as well as server name on the assumption that mirrors will be forthcoming.

Astro::FITS::CFITSIO is a perl interface to William Pence's cfitsio subroutine library. For more information on cfitsio, see http://heasarc.gsfc.nasa.gov/fitsio. This module attempts to provide a wrapper for nearly every cfitsio routine, while retaining as much cfitsio behavior as possible. As such, one should be aware that it is still somewhat low-level, in the sense that handing an array which is not the correct size to a routine like fits_write_img() may cause SIGSEGVs.

Astro::SunTime is a perl module that provides an interface to calculate sunrise/sunset times.

Stores information about a FITS header block in an object. Takes an hash with an array reference as an argument. The array should contain a list of FITS header cards as input.

The Astro::SIMBAD module is an objected orientated Perl interface to the SIMBAD astronomical database. SIMBAD provides basic data, cross-identifications and bibliography for astronomical objects outside the solar system.

The Astro::ADS module is an objected orientated Perl interface to the Astrophysics Data System (ADS) abstract service. The ADS is a NASA-funded project whose main resource is an Abstract Service, which includes four sets of abstracts: 1) astronomy and astrophysics, containing 719,449 abstracts; 2) instrumentation, containing 608,834 abstracts; 3) physics and geophysics, containing 1,079,814 abstracts; and 4) Los Alamos preprint server, containing 4,104 abstracts. Each dataset can be searched by author, object name (astronomy only), title, or abstract text words.

The module is an object orientated interface to the both the first and second Digital Sky Surveys at the ESO-ECF online archive. While the first sky survey is 100% complete, the second survey covers 98% of the sky in Red, 45% of the sky in Blue and 27% of the sky in the Infra-red.