ch 11-1 jovian planets

What is the mass of Jupiter?

• Approximately 1.9 × 10²⁷ kg, or about 318 Earth masses.

why is there enormous pressure in Jupiter’s interior?

• Jupiter has strong gravity that greatly compresses these light gases

what is the reason for Jupiter’s strong magnetic field?

• due to shape and assume core is dense, compact, and rocky

what are the jovian planets?

• Jupiter, Saturn, Uranus, Neptune

What is the general structure of a Jovian planet?

• A small, dense core surrounded by massive layers of gas.

What are the primary gases in Jovian planets?

• Hydrogen (H) and helium (He).

How do Jovian planets differ from terrestrial planets?

• Jovian planets are large, low-density gas giants with thick atmospheres, while terrestrial planets are smaller, rocky, and denser.

which jovian planets are the gas giants?

• Jupiter and Saturn

which jovian planets are the ice giants?

• Uranus and Neptune

What types of satellites do Jovian planets have?

• Jovian planets have extensive systems of moons.

Do all Jovian planets have rings?

• Yes. Jupiter, Saturn, Uranus, and Neptune all have ring systems.

• Saturn being the most famous

What kind of magnetic fields do Jovian planets possess?

• They have powerful magnetic fields generated by their interiors.

• more powerful than Earth

What are dynamic weather systems?

• Rapidly changing atmospheric features such as winds, storms, clouds, and jet streams.

Which Jovian planets can be seen with the naked eye?

• Jupiter and Saturn.

• (Uranus and Neptune are too far away)

Who first observed Jupiter's moons?

• Galileo Galilei in 1609.

Why was Galileo's observation of Jupiter's moons important?

• It showed that not everything in the universe orbited Earth, supporting the heliocentric model.

What did Galileo discover in 1609?

• The four largest moons of Jupiter using a telescope.

what was Galileo’s observations about Jupiter’s moons?

• first believed they were stars

• then noticed they moved in wrong direct in regard to background stars

• remained in Jupiter’s proximity but changed relative to each other

Was Saturn known before the invention of the telescope?

• Yes. Saturn was known to ancient astronomers and can be seen with the naked eye.

Who first observed Saturn through a telescope?

• Galileo Galilei.

Who proposed that Saturn was surrounded by a ring?

• Christiaan Huygens.

Why was Galileo confused by Saturn?

• His telescope was not powerful enough to clearly resolve the rings, so Saturn appeared to have strange side structures.

• saw pair of objects on their side → “tripled bodied”

When was Uranus discovered?

• 1781.

Why was Uranus not immediately recognized as a planet?

• It was initially thought to be a star.

When was it determined that Uranus orbited the Sun?

• 1783

• Bodah determined that it revolved around the sun.

Why wasn't Uranus discovered by ancient astronomers?

• Although visible to the naked eye under ideal conditions, it is very faint and was mistaken for a star.

Who first recorded Neptune, although he did not recognize it as a planet?

• Galileo Galilei in 1612.

Who predicted the existence and location of Neptune?

• John Couch Adams and Urbain Le Verrier.

  • mathematically predicted that some unknown planet was helping Uranus motion

When was Neptune first observed as a planet?

• 1846.

• applied Kepler’s Laws of motions motion and Newtons

What was the first planet discovered by mathematical prediction?

• Neptune.