|
Index (N)
NA - NC
ND - NF
NG - NJ
NK - NN
NO - NR
NS - NV
NW - NZ
Moment of truth
|
The fastest man-made object that ever leave the Earth is the Pinoeer 10 spacecraft, launched in 1972, and attained a speed of more than 32000 mph. |
|
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
NO - NR
noble gas Chem.
See inert gas.
noble metal Chem.
A metal that is chemically very unreactive and is resistant to corrosion and oxidation. It is sometimes found in their native metallic states in nature.
For example, gold, silver and platinum.
nova Astron.
A star that suddenly flare up, often by a factor of as much as 10 000. It can remain bright for a few days or even months before slowly fades back to its original luminosity.
It is often the result of an explosion on the surface of a white dwarf star, caused by matter (such as hydrogen) falling onto its surface from the atmosphere of a binary companion star. Nova
generally appears in regions close to the Milky Way. Nova may occur more than once on a particular star. These stars are known as recurrent nova.
NO - NR
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
|
