It’s finally here! SpaceX Thursday officially priced its IPO at $135 per share, valuing the company at around $1.75 trillion, capping a frenetic six month stretch that defied many of the norms of initial public offerings. If the IPO goes well, expect to see more space public offerings soon. Sierra Space, for one, has been taking steps towards an IPO that could happen as soon as this year, according to two people familiar with their plans.