1ordinary matter consisting of protons, electrons, and neutrons that comprises atoms, planets, galaxies, and other bodies.
Baryonic Matter
2The universe is made up of
4.6% Baryonic matter, 24% Dark matter, 71.4% dark energy
3has gravity but does not emit light.
Dark Matter
4(source of anti-gravity) a force that counteracts gravity and causes the universe to expand.
Dark energy
5early stage formation of a star resulting from the gravitational collapse of gases.
Protostar
6stars that fuse hydrogen atoms to form helium atoms in their cores. Outward pressure from nuclear fusion is balanced by gravitational forces. (most stars such as the sun belong here)
Main Sequence Star
7(distance light can travel in a year) A unit of length used to measure astronomical distance.
Light Years
8a nuclear fusion reaction responsible for energy produced by stars.
Thermonuclear reaction
9What is the speed of light?
299,792km/sec
10Earth to Moon
1.3 light seconds
11Earth to Sun
8 Light Minutes
12Earth to Mars
12.7 light minutes
13Earth to Alpha Centauri
4.4 light years
14Earth to Far side Milky Way
52,000 light years
15How old is the universe?
Atleast 13.8 billion year old
16How old is the solar system?
Atleast 4.5 - 4.6 years old
17How large exactly is a billion?
32years
18What is a hubble?
a space telescope
19announced his discovery of "REDSHIFT"
Edwin Hubble
20Interpreted that galaxies are moving away from each other.
Edwin Hubble (1929)
21He observed that spectral lines of starlight are shifted toward the red part of the electromagnetic spectrum.
Edwin Hubble
22can explain what may be holding galaxies together for the reason that the low total mass is insufficient for gravity alone.
Dark Matter
23can explain the observed accelerating expansion of the universe
Dark Energy
24Stellar Interiors are like furnaces
Elements are synthesized or fused together
25What do stars produce?
stars produce gas and dust energy in the galaxies.
26What are the two correct sequence of the life cycle of a star
STELLAR NEBULA BECOMES EITHER:
AVERAGE STAR - RED GIANT - PLANETARY NEBULA - WHITE DWARF
MASSIVE STAR - RED SUPERGIANT - SUPERNOVA - NEUTRON STAR OR BLACK HOLE
27What device is a cooled down radiation that carefully scans the sky?
Holmdel Horn Antenna
28Who are the founders of Holmdel Horn Antenna?
Arno Penzias and Robert Wilson in mid-1960s
29Massive main sequence stars burn up hydrogen faster than smaller stars. TRUE OR FALSE
True
30Sun burn up hydrogen in about 5 billion years TRUE OR FALSE
FALSE
31Sun burn up hydrogen in about 10 billion years TRUE OR FALSE
TRUE
32Building blocks of the universe
Stars
33What happens when there are instabilities within the clouds?
It will result in gravitational collapse, rotation, and heating up