Sun www.astronomy.com The Sun, an average-sized, middle-aged star, formed almost 5 billion years ago from a cloud of gas and dust.
Mercury solarsystem.nasa.gov Solar System Exploration: Solar System 101
Venus solarsystem.nasa.gov Solar System Exploration: Solar System 101
Earth solarsystem.nasa.gov Solar System Exploration: Solar System 101
Mars solarsystem.nasa.gov Solar System Exploration: Solar System 101
Jupiter solarsystem.nasa.gov Solar System Exploration: Solar System 101
Saturn solarsystem.nasa.gov Solar System Exploration: Solar System 101
Uranus solarsystem.nasa.gov Solar System Exploration: Solar System 101
Neptune solarsystem.nasa.gov Solar System Exploration: Solar System 101
Pluto is no longer a planet www.astronomy.com Pluto, reclassified as a dwarf planet in 2006, is located nearly 40 times as far from the Sun as Earth.
sun www.astronomy.com Observe the changing position of the Sun to determine the cardinal points.
solarsystem.nasa.gov Solar System Exploration: Solar System 101
can we travel to other solar systems? www.astronomy.com While interstellar travel is technically theoretically possible, the cosmic distance scale makes it anything but practical.

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