Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Stars are responsible for most of the naturally occurring elements and this is why I have named them on my list of wonders of the Universe. ... Linked to black holes we have hypervelocity stars, also called exiled stars, which were first proposed to exist in 1988. ... These stars are useful for astronomers to understand black holes and how our galaxy is made up, as during their lifetime, these stars travel across most of the galaxy. ...