Sound requires a medium to travel through, and space is a near-perfect vacuum, devoid of matter to carry sound waves. However, certain space phenomena, such as radio emissions from celestial objects like pulsars or Jupiter's magnetosphere, can be converted into audible frequencies, allowing us to 'hear' the cosmos.

Black holes are formed when massive stars reach the end of their life cycles. After a supernova explosion, the core collapses under its own gravitational force, creating a region so dense that not even light can escape. The boundary around a black hole, known as the event horizon, marks the point of no return.

Dark matter is a mysterious and invisible substance that doesn't emit, absorb, or reflect light. Its existence is inferred from its gravitational effects on galaxies and galaxy clusters. It's estimated to make up approximately 27% of the universe's total mass-energy content, yet its true nature remains one of the greatest unsolved mysteries in astrophysics.

In the vast cosmic ballet, larger galaxies often consume smaller ones, a process known as galactic cannibalism. When a smaller galaxy orbits a larger one closely, tidal forces can strip it of stars, gas, and dust, eventually merging it with the larger galaxy. The Milky Way, for instance, has cannibalized several dwarf galaxies over its history.

At the center of many galaxies, including our Milky Way, exist supermassive black holes. These cosmic behemoths can contain billions to billions of times the mass of our Sun. While they are fascinating objects to study, supermassive black holes also play a crucial role in shaping the structure and dynamics of their host galaxies.

Between the orbits of Mars and Jupiter lies the asteroid belt, a region teeming with millions of rocky objects. These asteroids are remnants from the early solar system, some of which may provide insights into the solar system's formation.

Traveling to other planets in our solar system is no small feat. A one-way journey to Mars, for example, can take around 6 to 9 months using current spacecraft technology. This long travel time necessitates careful planning and consideration of astronaut well-being during the journey.