blog post #1

Black holes- are the evolutionary endpoints of stars at least 10 to 15 times as massive as the Sun. If a star that massive or larger undergoes a supernova explosion, it may leave behind a fairly massive burned out stellar remnant. With no outward forces to oppose gravitational forces, the remnant will collapse in on itself. The star eventually collapses to the point of zero volume and infinite density.

Worm holes- A hypothetical "tunnel" connecting two different points in space such a way that a trip through the wormhole could take much less time than a journey between the same starting and ending points in normal space. The ends of a wormhole could, in theory, be intra-universe.

Dark energy- In the context of dark energy, the cosmological constant is a reservoir which stores energy. Its energy scales as the Universe expands. Applied to the supernova data, it would distinguish effects due to the matter in the Universe from those due to the dark energy. Unfortunately, the amount of this stored energy required is far more than observed and would result in very fast acceleration. So much so that the stars and galaxies would not form.

Titan- Titan is the largest moon of Saturn and the second largest moon in the solar system. Astronomers suspected that Titan might have an atmosphere. Scientists also believed they might find liquid seas or pools of methane meaning water would be frozen due to Titan's low surface temperature.

Pluto- is a dwarf planet that orbits far from the sun. It shares the region of its orbit with the Kuiper belt. From its discovery in 1930, people widely considered Pluto to be the ninth planet of our solar system. However, because of its small size and irregular orbit, many astronomers questioned whether Pluto should be grouped with worlds like Earth and Jupiter. astronomers now classify Pluto as a dwarf planet. Pluto cannot be seen without a telescope.