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.
The energy gets released when new molecules -- with stronger bonds -- are formed. ATP provides energy when it transfers phosphate groups to more strongly bonded glucose or fructose phosphates. The eventual formation of carbon dioxide, with its strong bonds, also releases energy.