MEET HELIOS, A NEW CLASS OF SPACE TUG WITH SOME REAL MUSCLE

Summary from the TLDR newsletter

Space tugs are miniature spacecraft that ferry small satellites to designated orbits. They are particularly useful for satellites that launch as part of a rideshare mission that seek to reach a different altitude or inclination than that of the primary payload. Impulse Space has built an in-space tug that can haul bigger satellites to more distant orbits. Helios is sized to fit within a Falcon 9 fairing and designed to fly on any medium- or heavy-lift vehicle to boost its capability. It will allow satellites to reach geostationary orbit within a day at a much lower cost than current alternatives.