C/2021 A1 (Leonard)
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C/2021 A1 was a long period comet that was discovered by G. J. Leonard at the Mount Lemmon Observatory on 3 January 2021 when the comet was 5 AU from the Sun. It had a retrograde orbit. The nucleus wa
Comet Leonard imaged near Wedderburn, Australia on 28 December 2021
Wide angle view of C/2021 A1 on December 28, 2021
The comet over Tenerife on 31 December 2021
Comet Leonard on January 2, 2022, one day before perihelion
Triangulum Galaxy
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The Triangulum Galaxy is a spiral galaxy 2.878 million light-years from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC 598. With the D25 isophotal diameter of 18.74 kilop
Galaxy Messier 33 in Triangulum (the Triangulum Galaxy)
NGC 604 in the Triangulum Galaxy
Composite of about 54 different pointings with Hubble's Advanced Camera for Surveys
Infrared image of M33 taken with the Spitzer Space Telescope