Dy

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DY, D. Y., Dy, or dy may refer to:

In science and technology, and mathematics[edit]

Astronomy[edit]

  • DY Persei, a variable star in the Perseus constellation
  • DY Persei variable, a subclass of R Coronae Borealis variables
  • DY Eridani, a triple star system less than 16.5 light years away from Earth

Other sciences[edit]

Businesses[edit]

People[edit]

Places[edit]

Other uses[edit]

See also[edit]