Claim: The HVS 7 is estimated to be 150 Mega years old, and it was only identified as a hyper-velocity star in 2006.
Evidence: HVS 7 -- hyper-velocity star 7, otherwise known as SDSS J113312.12+010824.9 is a rare star that has been accelerated to faster than our Milky Way Galaxy's escape velocity. It was identified as a hyper-velocity star in 2006. The high rotational velocity of HVS 7 means it is likely to be a young star near the main sequence, around 150 million years old and 3.7 times the mass of the sun.