Gravity and space

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Gravity and Space
In the physical sciences, mass and weight are different properties. Mass is an
inertial property that is, the tendency of an object to remain at constant velocity
unless acted upon by an external force. Weight is the force created when a mass
is acted upon by a gravitational field.
Gravitation
Celestial Factor
Body Relative to
Earth
Sun 27.9
Mercury 0.38
Venus 0.91
Earth 1
Moon 0.17
Mars 0.38
Jupiter 2.54
Saturn 1.08
Uranus 0.91
Neptune 1.19
Pluto 0.06
The relationship between mass and weight is that the mass always stay the
same weather you our on the Earth or a different planet but weight will always
change because weight relies on gravity and gravity varies from what planet you
are on.

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Night and day on Earth
Day is when the Earth is orbiting the sun (whilst turning itself) projecting the sun's
light onto the Earth as it goes. Only one side at a time can have the sun on it as
light cannot reach the other side of the planet. Night happens when the light from
the sun cannot reach the area you are in causing the stars to be visible because
they are giving of their own light as they burn in the sky.…read more

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Phases of the moon on the Northern hemisphere
Phases of the Southern hemisphere
The first artificial satellite was Sputnik 1, launched by the Soviet Union on 4
October 1957. This triggered the Space Race between the Soviet Union and the
United States.
In May, 1946, Project RAND had released the Preliminary Design of an
Experimental WorldCircling Spaceship, which stated, "A satellite vehicle with
appropriate instrumentation can be expected to be one of the most potent
scientific tools of the Twentieth Century.…read more

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Artificial satellites also have orbited the moon, the sun, asteroids, and the
planets Venus, Mars, and Jupiter. Such satellites mainly gather information about
the bodies they orbit.
An artificial satellite is a manufactured object that continuously orbits Earth or
some other body in space. Most artificial satellites orbit Earth. People use them
to study the universe, help forecast the weather, transfer telephone calls over the
oceans, assist in the navigation of ships and aircraft, monitor crops and other
resources, and support military activities.…read more

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Nicolaus
Copernicus.
.…read more

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Father of Modern Science." The motion of uniformly
accelerated objects, taught in nearly all high school and introductory college
physics courses, was studied by Galileo as the subject of kinematics. His
contributions to observational astronomy include the discovery of the four largest
satellites of Jupiter, named the Galilean moons in his honour, and the
observation and analysis of sunspots. Galileo also worked in applied science
and technology, improving compass design.…read more

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