The star nearest to Earth is the Sun. The Sun is a G-type main-sequence star located at the center of our solar system, approximately 93 million miles (150 million kilometers) away from Earth. It is the primary source of light, heat, and energy for our planet and sustains life on Earth through the process of photosynthesis, which powers most ecosystems and drives the Earth's climate system.

The speed of light in a vacuum is approximately 299,792,458 meters per second (m/s), which is rounded to about 300,000 kilometers per second (km/s). This constant is denoted by the symbol "c" in physics equations.

Orion is home to several bright stars, but the most prominent ones are often referred to as the "Orion Belt" or the "Three Kings." These three stars are Alnitak, Alnilam, and Mintaka. However, there are other bright stars in the Orion constellation as well, such as Betelgeuse and Rigel. Overall, there are numerous bright stars in Orion, but it's difficult to provide an exact count as it depends on the criteria used to define "bright."

The term "morning star" or "evening star" is often used to refer to the planet Venus. Venus is the third-brightest natural object in the sky after the Sun and the Moon. When Venus is visible in the morning sky before sunrise, it is referred to as the "morning star." Similarly, when Venus is visible in the evening sky after sunset, it is called the "evening star."