In which constellation is Robert's Quartet located: Phoenix, Draco, Grus or Corona Borealis?

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space

Robert's Quartet is a tightly packed group of four galaxies about 160 million light-years away in the constellation Phoenix.

Learn more on Codexery: Robert's Quartet in Galaxy Clusters and Groups

How many moons does Mars have?

Which planet is known as the Red Planet?

In which constellation is HD 131496 located: Eridanus, Carinae, Boötes or Ursa Minor?

In what year was NGC 6109 discovered: 1836, 1864, 1880 or 1888?

In what year was Mars Science Laboratory launched: 2008, 2011, 2020 or 2022?

In what year was 13P/Olbers discovered: 1811, 1812, 1815 or 1823?