The role of gravity is the force that pulls objects together in the life cycle of stars in order to affect more objects. All objects exist because of a balance between gravity and some counteracting force.
The role of gravity is the gravity that cause the ignition of the stars.
“Gravity would put all masses all together to a certain point”
- Image 1: http://www.l2so.com/download/Galaxy-wallpaper-34046/240x400 [Accessed 27/10/15]
- Image 2: http://www.strangenotions.com/what-gravity-teaches-us/ [Accessed 28/10/15]
The role of gravity is the force that pulls objects together in the life cycle of stars in order to affect more objects. All objects exist because of a balance between gravity and some counteracting force.
The role of gravity is the gravity that cause the ignition of the stars.
“Gravity would put all masses all together to a certain point”
- Image 3 http://www.seasky.org/celestial-objects/stars.html [Accessed 28/10/15]
- Image 4 https://www.thinglink.com/scene/665333758823497729 [Accessed 28/10/15]
When the radiation pressures, gravity pulls the gas of the star. It gains energy and heat up the interior stars. The temperature and pressure rise and continues to collapse until the new counteracting forces come out. Or until the black hole appears when gravity pulls all the mass into a single point.
![Picture](/uploads/4/1/4/4/41444241/3874211.jpg?296)
- Image 5 http://www.astronomynotes.com/starsun/s7.htm[Accessed 28/10/15]
- Image 6 http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/stars/lifecyclestarsrev1.shtml[Accessed 28/10/15]
Gravity constantly causes the star to collapse. The pressure counteracts the force of gravity, into hydrostatic equilburum, as long as the gravity pull the stars inwards, and the pressure pushes the star outwards.
Since energy is on longer being radiacted from the core, Which contains iron, fusion in the core ceases. The temperature of the core rises to over 100 billion degrees as the repulsive force between the nuclei overcomes the force of gravity when a supernova exploses that the core recoils out from the heart of the stars in a shack wave.
- Image 7 http://www.seasky.org/celestial-objects/stars.html [Accessed 29/10/15]
Nuclear Fusion
![Picture](/uploads/4/1/4/4/41444241/8487536.jpeg?334)
- Nuclear fusion is an atomic reaction that fuels stars. Many nuclei combined together to make a bigger and different element. It release lots of energy in gammy rates and that’s where the energy is from. And stars are powered by nuclear fusion in their core. For instance, the sun’s internal temperature is less than fifteen million Kelvin.
In the cores of main sequence stars involves positive hydrogen nuclei, ionized hydrogen atoms or protons to slam together. The combined mass the produced products is less than the total mass of the reactants due to energy release.
![Picture](/uploads/4/1/4/4/41444241/9107781.jpg?346)
“Two hydrogen small atoms are merged together into an atom to form a light isotope of helium- He.
Medium-sized stars (sun) the hydrogen becomes depleted it can convert into oxygen and carbon.
Massive Stars that is greater than five times the mass of the Sun: high mass stars convert helium atoms into carbon and oxygen as well, followed by the fusion of carbon and oxygen into neon, sodium and so on.”
- (‘Nuclear fusion in stars’ [online] Enchanted learning
- http://www.enchantedlearning.com/subjects/astronomy/stars/fusion.shtml
As long as there is hydrogen fuel in the core, stars can emit energy and the fusion reaction shut down and the star begins to shrink and cool.
Australian Contribution
CSIRO Astronomy and Space
CSIRO leads facilities for astronomy and spacecraft tracking, internationally renowed for radio astronomy research and engineering expertise.
Australia Telescope National Facility (ATNF) is one of the worlf’s most advanced radio astronomy facilities in the southern hemisphere
AFNF occupies an important role in international radio astronomy
In NSW, “64-metre Parkers radio telescope, known as “The Dish”
Six- 22-metre diameter antennas called Australia Telescope. Single 22- metre antenna known as Mopra radio telescope” (ATNF website, http://www.csiro.au/en/Research/Facilities/ATNF/About-ATNF)
ASKAP stands for Australian Square Kilometre Array Pathfinder. It currently underway and it products its science results which is a part of the ATNF.
ATNF conducts 90 percent of Australian radio astronomy research. It used to investigate from the evolution of stars, rapidly spinning neutron stars. ATNF ranked second among the world’s radio telescope in terms of total number of citations to research papers.
ATNF users are international Observing is done 24 hors a day, every day of the day. Operating the AFNF requires skills and expertise and scheduling of observing time, maintenance and upgrades.
CSIRO leads facilities for astronomy and spacecraft tracking, internationally renowed for radio astronomy research and engineering expertise.
Australia Telescope National Facility (ATNF) is one of the worlf’s most advanced radio astronomy facilities in the southern hemisphere
AFNF occupies an important role in international radio astronomy
In NSW, “64-metre Parkers radio telescope, known as “The Dish”
Six- 22-metre diameter antennas called Australia Telescope. Single 22- metre antenna known as Mopra radio telescope” (ATNF website, http://www.csiro.au/en/Research/Facilities/ATNF/About-ATNF)
ASKAP stands for Australian Square Kilometre Array Pathfinder. It currently underway and it products its science results which is a part of the ATNF.
ATNF conducts 90 percent of Australian radio astronomy research. It used to investigate from the evolution of stars, rapidly spinning neutron stars. ATNF ranked second among the world’s radio telescope in terms of total number of citations to research papers.
ATNF users are international Observing is done 24 hors a day, every day of the day. Operating the AFNF requires skills and expertise and scheduling of observing time, maintenance and upgrades.