@ToughSf The Sun is the second generation star at this position, and the rocky planets in the solar system are likely the result of the condensation of remnants of the previous generation stars and planets, while gas planets are the product of the condensation of the Sun's accretion disk.
@Orbital_Perigee In addition, I think you may want to explain that Atlas's engine comes from the Energy rocket, but the Energy signal is developed from the Ascension/Lightning, and the Ascension/Lightning comes from the R7 missile of the CCCP, and the R7 is a direct product of the V2 rocket.
@Orbital_Perigee There is no connection between the Soviet space shuttle and the American space shuttle. The two are unrelated competing products. Is it unreasonable to directly draw lines to connect them?