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2. In Depth | Sun – NASA Solar System Exploration

   solarsystem.nasa.gov/solar-system/sun/in-depth.amp

   The Sun is the largest object in our solar system. Its diameter is about 865,000 miles (1.4 million kilometers). Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest bits of debris in orbit around it.

3. The Sun By the Numbers – NASA Solar System Exploration

   solarsystem.nasa.gov/sun-by-the-numbers

   The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything – from the biggest planets to the smallest bits of debris – in its orbit.

4. What is a Planet? | Planets – NASA Solar System Exploration

   solarsystem.nasa.gov/planets/in-depth.amp

   A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.

5. Gravity Assists | Mission – NASA Solar System Exploration

   solarsystem.nasa.gov/missions/cassini-hds/mission/gravity-assists

   From Cassini's launch through the mission's Grand Finale, “gravity assists” were essential to making the spacecraft go where the scientists wanted it to go. This propellant-saving, mission-enabling technique has been used in solar system exploration since the early 1970s.

6. In Depth | Haumea – NASA Solar System Exploration

   solarsystem.nasa.gov/planets/dwarf-planets/haumea/in-depth.amp

   Haumea takes 285 Earth years to make one trip around the Sun. As Haumea orbits the Sun, it completes one rotation every 4 hours, making it one of the fastest rotating large objects in our solar system.

7. In Depth | Jupiter – NASA Solar System Exploration

   solarsystem.nasa.gov/planets/jupiter/in-depth.amp

   With a radius of 43,440.7 miles (69,911 kilometers), Jupiter is 11 times wider than Earth. If Earth were the size of a nickel, Jupiter would be about as big as a basketball. From an average distance of 484 million miles (778 million kilometers), Jupiter is 5.2 astronomical units away from the Sun.

8. In Depth | Mars – NASA Solar System Exploration

   solarsystem.nasa.gov/planets/mars/in-depth.amp

   When the solar system settled into its current layout about 4.5 billion years ago, Mars formed when gravity pulled swirling gas and dust in to become the fourth planet from the Sun. Mars is about half the size of Earth, and like its fellow terrestrial planets, it has a central core, a rocky mantle, and a solid crust.

9. In Depth | Uranus – NASA Solar System Exploration

   solarsystem.nasa.gov/planets/uranus/in-depth.amp

   Uranus took shape when the rest of the solar system formed about 4.5 billion years ago – when gravity pulled swirling gas and dust in to become this ice giant. Like its neighbor Neptune, Uranus likely formed closer to the Sun and moved to the outer solar system about 4 billion years ago, where it is the seventh planet from the Sun.

10. In Depth | Titan – NASA Solar System Exploration

    solarsystem.nasa.gov/moons/saturn-moons/titan/in-depth.amp

    Because Titan is less massive than Earth, its gravity doesn't hold onto its gaseous envelope as tightly, so the atmosphere extends to an altitude 10 times higher than Earth's—nearly 370 miles (600 kilometers) into space.

11. Neptune By the Numbers – NASA Solar System Exploration

    solarsystem.nasa.gov/neptune-by-the-numbers

    The gravitational acceleration experienced at its surface at the equator. The speed needed for an object to break away from the gravitational pull of a planet or moon. The numbers displayed here are approximations. For more precise data, please visit JPL Solar System Dynamics. Page Updated: May 16, 2024.