An object in space (or moon) that orbits a planet or minor planet. *

A minor-planet moon is an astronomical object that orbits a minor planet as its natural satellite.

Explanation:

An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. Many planets have moons that orbit them. A satellite can also be man-made, like the International Space Station.

Answer is: HCO₃⁻ + H₂S → H₂CO3 + HS⁻.

According to  Bronsted-Lowry theory acid are donor of protons and bases are acceptors of protons (the hydrogen cation or H⁺).  

The bicarbonate anion (HCO₃⁻) is Bronsted base and it can accept proton and become conjugate acid H₂CO₃.

H₂S (hydrogen sulfide) is Bronsted-Lowry acid because it lost proton.