  The on-orbit processing of massive satellite-native data relies on powerful
computing power. Satellite computing has started to gain attention, with
researchers proposing various algorithms, applications, and simulation
testbeds. Unfortunately, a practical platform for deploying satellite computing
is currently lacking. As a result, the industry needs to make relentless
efforts to achieve this goal. We suggest using cloud-native technology to
enhance the computing power of LEO satellites. The first main satellite of the
Tiansuan constellation, BUPT-1, is a significant example of a cloud-native
satellite. Prior to delving into the details of BUPT-1, we define the essential
concepts of cloud-native satellites, i.e., the cloud-native load and
cloud-native platform. Afterwards, we present the design scheme of cloud-native
satellites, including the architecture of BUPT-1 and the experimental subjects
it can support. Two validation tests are shown to reflect the operation and
capability of BUPT-1. Besides, we predict possible research fields that could
shape the future of satellites in the next decade.
