Different celestial objects produce different types of spectra. The spectrum of an object is one means of identifying what type of object it is. How different spectra arise is shown in the schematic diagram below.
After a simple reaction breaking down ATP to ADP, the energy released from the breaking of a molecular bond is the energy we use to keep ourselves alive. When the phosphate group is removed. After a simple reaction breaking down ATP to ADP, the energy released from the breaking of a molecular bond is the energy we use to keep ourselves alive.
Normally, this reaction happens in both directions, which means that ATP breaks down into ADP, then ADP rebuilds itself into ATP. This process is mostly dependent upon the addition and subtraction of a phosphate molecule and the energy required to bond phosphate to ADP and release it from ATP.