Why didn't New Horizons stay in Pluto's orbit? [duplicate]

As everyone knows, New Horizons, which was sent some decades ago, reached Pluto on July 14th, 2015 and it stayed there for only 24 hours and after that it is going into the Kuiper Belt and thereafter into interstellar space like Pioneer and Voyager probes did before it. My question is, why was New Horizons not allowed to stay in Pluto's orbit to collect information on the dwarf planet, like MOM (Mars orbiter Mission) is doing around Mars? Is this due to scientists being less interested in searching for life in the Pluto system, or are there any other reasons?

• Look through the questions tagged new-horizons and you will see at least two duplicate of this question. It is a good idea to do that simple test (look through questions with same tag) before posting a new question. – Andrew Thompson Jul 19 '15 at 4:53
• It's pretty hard to stay someplace you never were. I have no idea where your 24 hour figure came from. – Loren Pechtel Jul 20 '15 at 1:52

• @Jez That's already discussed in my answer to the question I link (and it looks this question will be closed as a duplicate of). In theory, assuming our rockets have dry mass of nothing (no rocket body, no payload), which is a fair first order approximation because dry-to-wet mass ratio really is kept as low as possible, you'd need 1/e of the total launched mass of propellants to decelerate. See Tsiolkovsky rocket equation and Google "The tyranny of the rocket equation" for more info. – TildalWave Jul 19 '15 at 10:49