 Upsilon Andromedae A is a yellow @-@ white dwarf of spectral type F8V , similar to the Sun , but younger , more massive , and more luminous . According to its entry in the Geneva – Copenhagen survey , the star is around 3 @.@ 1 billion years old , and has a similar proportion of iron relative to hydrogen to the Sun . At around 1 @.@ 3 solar masses , it will have a shorter lifetime than the Sun . The amount of ultraviolet radiation received by any planets in the star 's habitable zone would be similar to the ultraviolet flux the Earth receives from the Sun . 
