NASA Universe on Instagram: "Pandora, our newest exoplanet explorer, is now one step closer to launch! 🛰️ The completion of the spacecraft bus — which houses the brains of the spacecraft — is a major milestone. Pandora will help astronomers study distant worlds, including the composition of their atmospheres. It will do so by observing each exoplanet as it passes in front of its star from our perspective, in an event called a transit, and also monitoring the star's light. As this happens