Because of the relative size and distance of the Sun , Earth and the moon , the Earth is the only planet in our Solar System that experiences total solar eclipses. A train is a trail of glowing ions left behind a large meteor as it falls through the atmosphere. The train is usually only visible for a few seconds before the ions combine with other atoms in the atmosphere and lose their charge. During this time, the object seems to be crossing the disk of the Sun. Transit is the passage of a moon in front of its primary.
Transit is the passage of an object across an observer's meridian .
They are Kuiper Belt objects left over from the formation of the solar system . Pluto may be a TNO, albeit a rather massive one. Compare to cislunar . The collection of transneptunians is known as the Transneptunian Bely or the Kuiper Belt . Triton was discovered by William Lassell in 1846.