Jupiter

Question 1

What is the largest planet in our solar system?

Answer 1

Jupiter

Question 2

What are the primary components of Jupiter?

Answer 2

Hydrogen and helium

Question 3

What is the Great Red Spot?

Answer 3

A giant storm on Jupiter that has been raging for hundreds of years

Question 4

How long is a day on Jupiter?

Answer 4

Just under 10 hours

Question 5

How long is a year on Jupiter?

Answer 5

Almost 12 Earth years

Question 6

What is unique about Jupiter’s magnetic field?

Answer 6

It is the strongest magnetic field of any planet in the solar system

Question 7

How many moons does Jupiter have?

Answer 7

At least 95 moons

Question 8

Name the four largest moons of Jupiter.

Answer 8

• Io
• Europa
• Ganymede
• Callisto

Question 9

What type of planet is Jupiter classified as?

Answer 9

Gas giant

Question 10

What characterizes Jupiter’s atmosphere?

Answer 10

Swirling cloud stripes of various colors

Question 11

What is the maximum wind speed on Jupiter?

Answer 11

Up to 384 miles per hour

Question 12

True or False: Jupiter has a solid surface.

Answer 12

False

Question 13

What is the apparent magnitude of Jupiter at opposition?

Answer 13

As bright as −2.94

Question 14

What phenomenon occurs when Jupiter is at opposition?

Answer 14

It appears to go into retrograde motion for about 121 days

Question 15

What did ancient Chinese astronomers associate with Jupiter?

Answer 15

The ‘sui star’ and a cycle of twelve earthly branches

Question 16

Who was the first to discover Jupiter’s four largest moons?

Answer 16

Galileo Galilei

Question 17

What did the Voyager missions discover about the Great Red Spot?

Answer 17

It confirmed that the Great Red Spot is anticyclonic

Question 18

What was the first spacecraft to orbit Jupiter?

Answer 18

Galileo

Question 19

What was a significant finding of the Galileo mission?

Answer 19

Hydrogen composes up to 90% of Jupiter’s atmosphere

Question 20

What is the purpose of the Juno mission?

Answer 20

To study Jupiter in detail from a polar orbit

Question 21

Fill in the blank: Jupiter has a faint _______ system made of dust and small particles.

Answer 21

ring

Question 22

What did the 2016 paper report about the Babylonians?

Answer 22

They used the trapezoidal rule for integrating the velocity of Jupiter

Question 23

What is the angular diameter of Jupiter?

Answer 23

Varies from 50.1 to 30.5 arc seconds

Question 24

What is the delta-v required to enter a Hohmann transfer orbit from Earth to Jupiter?

Answer 24

6.3 km/s

Question 25

What type of radio emissions were discovered from Jupiter?

Answer 25

* Decametric radio bursts * Decimetric radio emission * Thermal radiation

Question 26

What is the significance of Ole Rømer's observation of Jupiter's moons?

Answer 26

It helped estimate the speed of light

Question 27

What did the New Horizons probe study during its flyby of Jupiter?

Answer 27

Plasma output from volcanoes on Io and all four Galilean moons

Question 28

What spacecraft completed its first flyby of Jupiter on August 27, 2016?

Answer 28

Juno ## Footnote Juno sent back the first-ever images of Jupiter's north pole.

Question 29

How many orbits did Juno complete before the end of its budgeted mission plan?

Answer 29

12 orbits ## Footnote The mission ended in July 2018.

Question 30

When was Juno's mission operations plan extended to September 2025?

Answer 30

January 2018 ## Footnote The extension included four lunar flybys.

Question 31

What will happen to Juno at the end of its mission?

Answer 31

It will perform a controlled deorbit and disintegrate into Jupiter's atmosphere ## Footnote This is to avoid contaminating Jupiter's moons.

Question 32

What was the cancelled NASA mission aimed at studying Jupiter's icy moons?

Answer 32

JIMO (Jupiter Icy Moons Orbiter) ## Footnote It was cancelled in 2005 due to funding difficulties.

Question 33

What is the name of the European Space Agency's mission launched on April 14, 2023?

Answer 33

JUICE (Jupiter Icy Moon Explorer) ## Footnote It aims to study Jupiter's larger icy moons.

Question 34

What is the name of NASA's mission launched on October 14, 2024?

Answer 34

Europa Clipper ## Footnote It is part of the continued exploration of Jupiter's moons.

Question 35

How many known natural satellites does Jupiter have?

Answer 35

97 known natural satellites ## Footnote This number is likely to increase with more observations.

Question 36

What are the four largest moons of Jupiter called?

Answer 36

Galilean moons ## Footnote They are Ganymede, Callisto, Io, and Europa.

Question 37

What pattern do the orbits of Io, Europa, and Ganymede form?

Answer 37

Laplace resonance ## Footnote This affects their orbits and shapes.

Question 38

What geological activity is prominently observed on Io?

Answer 38

Volcanic activity ## Footnote Io experiences the strongest tidal forces among the Galilean moons.

Question 39

What is the average diameter of Ganymede?

Answer 39

5,262 km ## Footnote It is the largest moon in the Solar System.

Question 40

What group do the innermost regular moons of Jupiter belong to?

Answer 40

Inner group ## Footnote These moons have diameters less than 200 km.

Question 41

What is the average distance of the Himalia group from Jupiter?

Answer 41

11–12 million km ## Footnote This group consists of prograde-orbiting moons.

Question 42

What are the Trojan asteroids?

Answer 42

Asteroids that are controlled by Jupiter's gravitational field ## Footnote They are located around the Lagrangian points of Jupiter.

Question 43

True or False: Jupiter has more impacts from comets than any other planet in the Solar System.

Answer 43

True ## Footnote Jupiter experiences about 200 times more impacts than Earth.

Question 44

What event in July 1994 was closely observed on Jupiter?

Answer 44

Comet Shoemaker–Levy 9 collision ## Footnote The impacts were monitored by various observatories.

Question 45

Fill in the blank: Jupiter has been called the Solar System's _______.

Answer 45

vacuum cleaner ## Footnote This is due to its immense gravity well.