Because its density is so high, neutrons spin in the same way that electrons do so must obey the Pauli Exclusion Principle. 6. A pulsar does not pulse, it emits beams of radiation that sweep around the sky as the neutron star rotates, and astronomers detect pulses when they sweep over the Earth. 11. Sometimes in binary systems, mass flows into a hot accretion disk around the neutron star and causes the emission of x rays.
Which of the following planets is NOT a gas giant? a. Earth b. Jupiter c. Saturn d. Uranus 16. The sun gets its energy from a. burning fuel b. nuclear fusion c. shrinking due to gravity d. convection 17. The number of on any planet can be used to estimate how old the surface is.
This planet is two-thirds of our moon and it is the largest rock in the Kuiper belt. After the discovery of Pluto, Scientist thought that it was too small to rotate around the sun. Pluto has not been visited by a spacecraft yet. It is so far that only the Hubble space telescope can see it; but it can only see its largest features. A spacecraft, named Horizon, launched in 2006, and it will hopefully reach Pluto in 2015.
More than a century later, Einstein, came up with the theory of relativity. It states that nothing can travel faster than the speed of light, therefore, no matter can escape it. (O.N.L. 47-56) Karl Schwarzschild, in 1917 used Einstein theory to calculate that if a star of a curtain mass was to shrink pasted the critical point it would become a Black Hole. The theory is named in his honor, the Schwarzschild radius.
The Sun serves as a magnet that uses its gravitational pull to hold the solar system together. If the Sun were to disappear, what would hold the planets together? The answer might be a black hole. A black hole is a theorized body whose gravity is so strong that even light can’t escape from within it (Black Holes, Quasars &Universe by Harry L. Shipman p.64). If light can’t escape from a black hole, then it must be invisible - therefore how can we know that the black holes exist?
The solar system C. Our own Milky Way galaxy D. A planetary nebula Feedback Correct Marks for this submission: 5.00/5.00. Question 4 Correct Mark 5.00 out of 5.00 Flag question Question text Astronomers can use telescopes on the ground to observe electromagnetic radiation of some wavelengths, but other wavelengths are
For example, a theory states that the universe is infinitely large with an infinitely amount of stars was met by the Olber’s paradox. It states that if that is the case, the infinite amount of star present in the universe would make the sky infinitely bright. This paradox could be explained by what Georges Lemaitre has suggested, as the universe is not infinitely large and it has not existed forever. The universe then kept on expanding ever since to become the current size of today and will keep on expanding. Before the birth of the universe, there was nothing.
Sunspots can be quite small ([IMAGE]1500 km diameter), and reach sizes up to 50000 km. While it is known that the darker appearance of the umbra and penumbra is due to their lower temperatures, the sharpness of the boundaries between the umbra and penumbra, and between the penumbra and photosphere, is a phenomenon that is not yet properly understood. While sunspots, especially large ones, can be fairly long-lived (their lifetimes being measured in weeks and months), they do eventually disappear, often by successive fragmentation into smaller and smaller sunspots. Likewise, sunspots do not suddenly appear fully grown, but usually show up as small structures, irregularly shaped and usually without a penumbra (darker structures without penumbra are
Ole Roemer, Cassini’s assistant, used Cassini’s data and additional observations of his own to determine the relationship between the earth’s distance from Jupiter and the timing of Io’s occultations. He used his estimate of the time light took to traverse earth’s orbit (22 minutes) to predict the delay in Io’s 1676 eclipse to be approximately 10 minutes. (Roemer did not know the diameter of the earth’s orbit, so he never actually made a prediction of the speed of light.) Roemer presented his results to the French Academy of Sciences,
There is much evidence behind the Big Bang theory, but it continues to face various challenges. Ultimately, this theory was proved by Arno Penzias and Robert Wilson in 1964. The radio telescope they built detected the background energy which Robert Dicke believed was released by the Big Bang. This theory is also supported by the evidence that the universe has a history – which is not implied by the Steady State hypothesis. Due to today’s advanced technology, “the most powerful modern telescopes can detect objects billions of light-years from Earth”.