SpaceX has been enjoying growing uptake of its internet-from-space Starlink service, but in a weird twist, the company is about to lend a hand to its main rival in the sector.

That change gives companies like Taara a chance to compete directly with Elon Musk 's Starlink and T-Mobile's TMUS -0.94% Get ...

In 2015, SpaceX CEO Elon Musk had a problem: His long-term plan to colonize Mars was short on cash. So Los Angeles-based Musk went north to Seattle to resurrect an old idea—internet service beamed ...