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A video on the Big Bang theory click here
Before the Big Bang, there was no time or space. The
Big Bang marked the beginning of the universe's
expansion from a single point that was infinitely small,
infinitely hot, and infinitely dense.
The Big Bang theory happened about 13.7 million years
ago. It was the first thing that ever happened the
During this period, the universe doubled in size at least
90 times, going from subatomic-sized to golf-ball sized
almost instantaneously.
Once scientists understood that the universe was
expanding, they immediately realized that it would
have been smaller in the past. At some point in the
past, the entire universe would have been a single
point. This point, later called the big bang, was the
beginning of the universe as we understand it today.
Celestial body is any natural body outside of the Earth’s
atmosphere. Some examples are the sun the moon and
other planets in our solar system. Any asteroid in space
is a celestial body
Radiation in space takes the form of subatomic
particles from the sun and the Milky Way. They can tear
through DNA molecules and damage or split them. The
damaged DNA can lead to cancers or other diseases.
Cosmic background radiation is a black body with
temperature slightly less than 3 degrees (about 2.76 K),
which peaks in the microwave portion of the spectrum.
The purpose of the Cosmic Background Explorer
(COBE) mission was to take precise measurements of
the diffuse radiation between 1 micrometer and 1 cm
over the whole celestial sphere.
The Wilkinson Microwave Anisotropy Probe (WMAP) is
a NASA Explorer mission that launched June 2001 to
make fundamental measurements of cosmology -- the
study of the properties of our universe as a whole
Spectroscope helps us find out what stars are made of.
It separates, white light from a star into a very wide
spectrum of colours.
For very distant galaxies, the effects of curved space
causes the wavelengths of light to be increasingly
red-shifted as the distance to Earth increases. This is
a Doppler-like effect, but it has nothing to do with
the speed of the galaxy.
Red shift analysis is when describing how far away a
distant object is.
The electromagnetic spectrum describes all the
wavelengths of light. From dark nebulae to exploding
stars, it reveals an otherwise invisible universe.
Electromagnetic waves. They are waves they travel
through the vacuum of space.
Astronomers are making new things like sensor
technology so they can produce systems with
intelligent responses, such as diagnosis, prognosis, and
Edwin Powell Hubble was an American astronomer who
had one of the most important observational
cosmologists of the 20th century.
The Hubble space telescope (HST) was his idea and he
proposed. The science Policies group (SPG) was
responsible for the hole thing.
High-velocity clouds of neutral hydrogen are raining
down on the galaxy, and presumably have been from
the beginning this would be the necessary source of a
gas disk from which the disk stars formed.