1. Work done by
Nuno Félix Paiva Alves, nº27, 7ºA

2. Img.1-Neptune

3. Discovery
 Neptune was discovered by Galileo Galilei, but he
thought that Neptune was a star.
 Neptune was localized by Galle and d’Arrest in 1846.
 Then, many people given the discovery to Galle.

4. Naming
 First, a few years after Galileo founded Neptune, this
one was called “the planet exterior to Uranus”.
 After that, Galle and Challis suggested the names of
Janus and Oceanus, respectively.
 Then Friedrich von Struve suggested the actual name
in honour of the roman god of the sea, in 1846.

5. Internal Structure

6. Internal structure
 The internal structure of Neptune not differ greatly
from that of Uranus. Neptune have a solid core mass
similar to that of the earth, comprising a mixture of ice
and various silicates, surrounded by a layer rich in
methane and ammonia water to which overlaps an
atmosphere comprising hydrogen, helium and
methane.

7. Atmosphere
 The atmosphere of Neptune is buffeted by strong
winds that are known and could reach 2000 km / h.
Like the other gas giants, the winds are usually
confined to well-defined bands between latitudes.
They also are huge storms (vortices) located, similar to
Jupiter's Great Red Spot.

8. Space Missions
 Neptune was visited only once and it was by
NASA’s spacecraft Voyager 2, on August 25, 1989.
 The spacecraft verified the existence of a magnetic
field surrounding the planet and discovered that
the field was offset from the centre and tilted in a
manner similar to the field around Uranus. The
question of the planet's rotation period was settled
using measurements of radio emissions. Voyager 2
also showed that Neptune had a surprisingly active
weather system. Six new moons were discovered,
and the planet was shown to have more than one
ring.

9. Space Missions
Voyager 2

10. Moons of Neptune
 Neptune has 13 moons around him. The names of the
firsts 7 names of the Neptune’s naturals satellites are:
Naiad;
Thalassa;
Despina;
Galatea;
Larissa;
Proteus;
Triton, the biggest one.

11. Moons of Neptune
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