Pluto

Pluto is the second-nearest dwarf planet from the Sun, after Ceres. Pluto was discovered on February 18, 1930 by Clyde William Tombaugh.

Close and Far
Once every so often (because of Pluto's strange orbit), it will cross Neptune's orbit, making it sometimes closer to Neptune during its orbit. However, they will never crash into each other. Pluto's ice during this time can modernly turn into gas.

Small and Smaller
Pluto is so small it is smaller than our Moon, and even Neptune's moon Triton. Yet it has many small moons. Ranging from a few kilometers in diameter to half the size of the icy ball.

Q:Can stars be seen at daytime?
A:On Pluto, yes. It is so far from the Sun, it does not block other stars light. The Sun just looks like a large white spot rather than a giant yellow disk. It is so always almost dark on Pluto. New Horizons, had reached Pluto in July 2015.

Trivia

 * Pluto was classified as a planet for 76 years, until it decided to be too small.
 * Pluto is not the smallest dwarf planet; bigger than Haumea, Makemake and Ceres.