Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers make contributions in doing citizen science, such as by monitoring variable stars, double stars sunspots, or occultations of stars by the Moon or asteroids, or by discovering transient astronomical events, such as comets, galactic novae or supernovae in other galaxies.
KStars is a freely licensed planetarium program using the KDE Platform. It is available for Linux, BSD, macOS, and Microsoft Windows. A light version of KStars is available for Android devices. It provides an accurate graphical representation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep sky objects, constellations from different cultures, all 8 planets, the Sun and Moon, and thousands of comets, asteroids, satellites, and supernovae. It has features to appeal to users of all levels, from informative hypertext articles about astronomy, to robust control of telescopes and CCD cameras, and logging of observations of specific objects.
A planetarium is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation.
The Space Telescope Science Institute (STScI) is the science operations center for the Hubble Space Telescope (HST) and for the James Webb Space Telescope (JWST). STScI is located on the Johns Hopkins University Homewood Campus in Baltimore, Maryland and was established in 1981 as a community-based science center that is operated for NASA by the Association of Universities for Research in Astronomy (AURA). In addition to performing continuing science operations of HST and preparing for scientific exploration with JWST, STScI manages and operates the Mikulski Archive for Space Telescopes (MAST), the Data Management Center for the Kepler mission and a number of other activities benefiting from its expertise in and infrastructure for supporting the operations of space-based astronomical observatories. Most of the funding for STScI activities comes from contracts with NASA's Goddard Space Flight Center but there are smaller activities funded by NASA's Ames Research Center, NASA's Jet Propulsion Laboratory, and the European Space Agency (ESA). The staff at STScI consists of scientists, spacecraft engineers, software engineers, data management personnel, education and public outreach experts, and administrative and business support personnel. There are approximately 100 Ph.D. scientists working at STScI, 15 of which are ESA staff who are on assignment to the HST project. The total STScI staff consists of about 675 people in 2019.
Stellarium is an open-source free-software planetarium, licensed under the terms of the GNU General Public License version 2, available for Linux, Windows, and macOS. A port Stellarium called Stellarium Mobile is available for Android, iOS, and Symbian as a paid version, being developed by Noctua Software. All versions use OpenGL to render a realistic projection of the night sky in real time.
Celestia is a 3D astronomy software program created by Chris Laurel. The program allows users to virtually travel through a computer generated universe. Celestia can display objects of various scales using OpenGL.
The Clark Planetarium is situated within The Gateway at the intersection of 400 West and 100 South in downtown Salt Lake City, Utah, United States. The Clark Planetarium opened in April 2003, replacing the historic Hansen Planetarium under a grant from the Clark Foundation in cooperation with Salt Lake County.
HNSKY or Hallo Northern Sky is a popular free and open-source planetarium program for Linux, Microsoft Windows, and Raspberry Pi to simulate the night sky. It is provided with several non-English language modules, numerous astronomical catalogues, conversion utilities and tools, as well as several stellar databases.
TheSky is an astronomy application designed to be used for educational and observational purposes. TheSky provides an extensive feature set including the following:
Cartes du Ciel is a free and open source planetarium program for Linux, macOS, and Windows. With the change to version 3, Linux has been added as a target platform, licensing has changed from freeware to GPLv2 and the project moved to a new website.
Redshift is a family of educational planetarium and astronomy software packages which allow the user to observe the sky from a range of dates, print off data based on the observations, and control a telescope, created by Maris Multimedia. It runs on PC with Microsoft Windows, Mac OS X, and iOS.
Planetarium software is application software that allows a user to simulate the celestial sphere at any time of day, especially at night, on a computer. Such applications can be as rudimentary as displaying a star chart or sky map for a specific time and location, or as complex as rendering photorealistic views of the sky.
WorldWide Telescope (WWT) is an open-source set of applications, data and cloud services, originally created by Microsoft Research but now an open source project hosted on GitHub. The .NET Foundation holds the copyright and the project is managed by the American Astronomical Society and has been supported by grants from the Moore Foundation and National Science Foundation. WWT displays astronomical, earth and planetary data allowing visual navigation through the 3-dimensional (3D) Universe. Users are able to navigate the sky by panning and zooming, or explore the 3D universe from the surface of Earth to past the Cosmic microwave background (CMB), viewing both visual imagery and scientific data about that area and the objects in it. Data is curated from hundreds of different data sources, but its open data nature allows users to explore any third party data that conforms to a WWT supported format. With the rich source of multi-spectral all-sky images it is possible to view the sky in many wavelengths of light. The software utilizes Microsoft's Visual Experience Engine technologies to function. WWT can also be used to visualize arbitrary or abstract data sets and time series data.
Digital Universe Atlas is a free open source software planetarium application, available under the terms of the Illinois Open Source License, and running on Linux, Windows, macOS, AmigaOS 4, and IRIX.
Skyglobe is an astronomy program for MS-DOS and Microsoft Windows first developed in the late 1980s and early 1990s, and originally sold as Shareware but now available as closed-source freeware. It plots the positions of stars, Messier objects, planets, sun and moon.
WinStars is an ASCOM standard-compliant shareware planetarium, ephemeris and solar system simulator developed by Richard Franck for the Android, iOS, Linux, OSX, and Microsoft Windows operating systems. WinStars functionality includes the ability to control computerized GoTo telescope mounts.
Deep-Sky Planner is observation planning and logging software for amateur astronomers. It helps observers to determine where and when to view all types of celestial objects. It runs on Windows.
Nightshade is a simulation and visualization software for teaching and exploring astronomy, Earth science, and related topics. Its focus is on use in digital planetarium systems or as an educational tool, with additional features to allow it to also be used on desktop or laptop computers. It operates on Linux, macOS and Windows.
C2A is a popular freeware planetarium program for Microsoft Windows and MS-DOS to simulate the night sky. It is provided with numerous astronomical catalogues, conversion utilities and tools, as well as several miscellaneous databases.
