Astronomy and Cosmology

The Sun is the star at the center of our solar system and is the closest star to Earth.

A telescope is an optical instrument designed to make distant objects appear nearer, containing an arrangement of lenses or curved mirrors.

The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the solar system from a rotating cloud of interstellar gas and dust.

Scientific consensus identifies Sagittarius A* as the supermassive black hole located at the center of the Milky Way galaxy.

Stellar black holes are formed when massive stars run out of fuel and collapse under their own gravity at the end of their life cycles.

The Milky Way galaxy is estimated to be approximately 100,000 light-years in diameter.

Our galaxy is known as the Milky Way.

The supermassive black hole at the center of the Milky Way, Sagittarius A*, is the most massive object in our galaxy.

Astronomical observations confirm that a supermassive black hole, known as Sagittarius A*, resides at the center of the Milky Way galaxy.

The solar system is located within the Milky Way galaxy.

A constellation is a group of stars that form a recognizable pattern in the night sky. The other options refer to different celestial objects or forces.

A star is a massive, luminous sphere of plasma held together by gravity. It produces energy through nuclear fusion, which we perceive as heat and light.

A comet is a small solar system body that orbits the sun and, when close enough, exhibits a visible coma or tail due to solar radiation. It is composed of ice, dust, and rock.

A telescope is an optical instrument designed to make distant objects appear closer and larger by gathering light. The other options are celestial bodies or physical forces.

A planet is a large celestial body that orbits a star, is spherical due to its own gravity, and has cleared its orbital path. The other options do not fit this definition.