Things in space with D

• Dark matter

  A major cosmological component, though unseen

• Dwarf planets

  Real class of bodies like Pluto and Ceres

• Diamonds

  Diamonds can form in space, including inside carbon-rich stars 💎

• Diamond

  Carbon can crystallize as diamond in some exoplanets and stars.

• Dead star

  A stellar remnant; term often used for white dwarfs

• Demeter

  Demeter is the name of a real asteroid in space.

• dioxide

  Dioxide gases can naturally exist in interstellar space.

The words in the list Things in space with D come from players of the word game City, Country, River.