Neil deGrasse Tyson has calculated that if Mjolnir was truly forged from a collapsing star, it would weigh roughly as much as 300 billion elephants. Measuring in elephants is now the gold standard for scientific accuracy apparently.
If Thor’s hammer is made of neutron-star matter, implied by legend, then it weighs as much as a herd of 300-billion elephants
— Neil deGrasse Tyson (@neiltyson) February 5, 2013
Later on, Neil received the actual hammer from Thor himself (pictured above) so he could “make the proper measurements”. It seems he is worth of lifting it. We’re not surprised.