Annie Jump Cannon Annie Jump Cannon was an astronomer who gave the theory of star spectra. Cannon was born in Dover, Delaware on December 11, 1863. She also was the main contributor of making the Henry Draper Star Catalogue. As she was growing up, her mother, Mary Jump, taught Annie Jump Cannon all of the constellations. It was her mother that inspired Annie Jump Cannon to study astronomy.
Astronomy 10 Chapter 11 1. Both used to be normal stars but the white dwarf ran out of hydrogen, they are both subjected to gravitational theories. A Neutron star is a fluid of neutrons, as hot at its surface as the inside of the sun and has a greater magnetic field. 3. Because its density is so high, neutrons spin in the same way that electrons do so must obey the Pauli Exclusion Principle.
Sunspots near the Sun's equator rotate at a faster rate than those near the solar poles. The following high resolution image shows a close-up view of a moderately large sunspot. The field of view covers about 60000 km horizontally, and 38000 km vertically. The penumbral diameter of this sunspot is about 16500 km; the Earth, with an equatorial radius of 6378 km, would cover up the umbra but not the penumbra. Sunspots can be quite small ([IMAGE]1500 km diameter), and reach sizes up to 50000 km.
1 AU b. 149,600,000 km c. 8.3 light-minutes d. all of the above 5. Distances between stars are usually measured in a. light-minutes b. astronomical units c. light-days d. light-years 6. Einstein developed an equation that changed ideas about the sun’s energy source by describing the relationship between a. mass and energy b. gravity
Depending on the current temperature on the stove the only way that you would be able to make the stove burn hotter would be to raise the amount of voltage. This means that the voltage would have to be multiplied to make the stove have a larger resistance thus making the heat higher. 7. The Hubble Space Telescope can see stars and galaxies where brightness is 1/50 of the faintest objects now observable using ground-based telescopes. Use the fact that the brightness of a point source, such as a star, varies inversely as the square of its distance from an observer to show that the space telescope can see about seven times farther than a ground-based telescope.
The energy of the three photons has three times the energy of the one photon, the energy of n photons of light is E=nh, E=nhc/ (2)(704nm)1.04 (3)(451nm). The energy of two photons corresponding to a wavelength of 451 blue light , is 1.04 times the energy of three photons corresponding to wavelength 704nm red light. f. A hydrogen atom with an electron in its ground state interacts with a photon of light with a wavelength of 1.22 × 10−6m. Could the electron make a transition from the ground state to a higher energy level? If it does make a transition, indicate which one.
Correct Marks for this submission: 10.00/10.00. Question 3 Correct Mark 5.00 out of 5.00 Flag question Question text What does the following photograph show? Select one: A. A spiral galaxy similar to the Milky way B. The solar system C. Our own Milky Way galaxy D. A planetary nebula Feedback Correct Marks for this submission: 5.00/5.00.
Astronomy is a natural science which is the study of celestial objects, the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic microwave background radiation. cosmology, is concerned with studying the universe as a whole. Astronomy is one of the oldest sciences. The early civilizations in recorded history, such as the Babylonians, Greeks, Indians, Egyptians, Nubians, Iranians, Chinese, and Maya performed methodical observations of the night sky. However, the invention of the telescope was required before astronomy was able to develop into a modern science.
Aristotle was correct about his first argument, but his second one was challenged by a scientist by the name of Ptolemy. Ptolemy elaborated onto Aristotle’s idea of the earth being the in the “center” of the universe second century AD. Next, Hawking discusses the accomplishments of Nicholas Copernicus, a polish priest who contributed to science around 1514. Copernicus’ theory (Copernican theory), stated that the sun was stationary and at the center while the earth and other planets orbited the sun. Nearly a century passed until Copernican
By focusing a telescope on an individual star or galaxy, one can similarly observe the spectrum of the light from the star or galaxy. Different stars have different spectra, but the relative brightness of the different colors is always exactly what one would expect to find in the light emitted by any opaque object that is glowing red hot (which have a characteristic spectrum that depends only on its temperature- a thermal spectrum- this means we can tell a star´s temperature from the spectrum of light). Moreover, since we know that each chemical element absorbs a characteristic set of very specific colors, by matching these to those that are missing from a star´s spectrum; we can determine exactly which elements are present in the star´s atmosphere. Also one must consider the Doppler Effect, in which the frequency varies between object coming towards or away from us. If an object is at a constant distance from us, is emitting a constant frequency, the same we receive (the gravitational field of the galaxy will not be large enough to have a significant effect).