Neptune

The cosmos at our fingertips.
Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Giant

Post by Joseph Buell » Fri Jan 15, 2021 3:38 am

Neptune is about four times wider than Earth. If Earth were a large apple, Neptune would be the size of a basketball.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Eighth Wanderer

Post by Joseph Buell » Fri Jan 15, 2021 3:39 am

Neptune orbits our Sun, a star, and is the eighth planet from the Sun at a distance of about 2.8 billion miles (4.5 billion kilometers).
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Short Day, Long Year

Post by Joseph Buell » Fri Jan 15, 2021 3:39 am

Neptune takes about 16 hours to rotate once (a Neptunian day), and about 165 Earth years to orbit the sun (a Neptunian year).
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Ice Giant

Post by Joseph Buell » Fri Jan 15, 2021 3:40 am

Neptune is an ice giant. Most of its mass is a hot, dense fluid of "icy" materials – water, methane and ammonia – above a small rocky core.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Gassy

Post by Joseph Buell » Fri Jan 15, 2021 3:41 am

Neptune's atmosphere is made up mostly of molecular hydrogen, atomic helium and methane.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Moons

Post by Joseph Buell » Fri Jan 15, 2021 3:42 am

Neptune has 14 known moons which are named after sea gods and nymphs in Greek mythology.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Faint Rings

Post by Joseph Buell » Fri Jan 15, 2021 3:43 am

Neptune has at least five main rings and four more ring arcs, which are clumps of dust and debris likely formed by the gravity of a nearby moon.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: One Voyage There

Post by Joseph Buell » Fri Jan 15, 2021 3:43 am

Voyager 2 is the only spacecraft to have visited Neptune. No spacecraft has orbited this distant planet to study it at length and up close.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: Lifeless

Post by Joseph Buell » Fri Jan 15, 2021 3:44 am

Neptune cannot support life as we know it.
Source: NASA
Nothing in life is to be feared, it is only to be understood.

Joseph Buell
Science Officer
Posts: 100
Joined: Tue Dec 22, 2020 3:38 pm
Location: Milky Way

Neptune: One Cool Fact

Post by Joseph Buell » Fri Jan 15, 2021 3:45 am

Because of dwarf planet Pluto’s elliptical orbit, Pluto is sometimes closer to the Sun (and us) than Neptune is.
Source: NASA
Nothing in life is to be feared, it is only to be understood.