An in-space propulsion company just raised a staggering amount of money

This week an in-space propulsion company, Impulse Space, announced that it had raised a significant amount of money, $300 million. This follows a fundraising round just last year in which the Southern California-based company raised $150 million.

This is one of the largest capital raises in space in a while, especially for a non-launch company. To understand why Impulse was able to raise so much additional money so quickly, Ars caught up with founder Tom Mueller and the company's chief executive, Eric Romo.