eclipse

a rare event in which one heavenly body moves into the shadow of another, especially when the moon passes between the sun and earth (or vice versa)

eclipse solar / lunar

Collocations total eclipse · partial eclipse

• The total eclipse will be visible from the UK.

  El eclipse total será visible desde el Reino Unido.

a time when someone or something is no longer important, successful, etc., because of the success of a rival

oscurecimiento, eclipse (moral)

Collocations fall from grace · decline in popularity

• The band's popularity was eclipsed by a new group.

  La popularidad de la banda fue eclipsada por un nuevo grupo.