What is the evidence that planets orbit other stars? (Check all that apply.)
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Option B, C and D are correct.
Doppler shift, decrease in brightness and brief magnification of distant stars brightness.
What is the evidence that planets orbit other stars? (Check all that apply.) a. Planetary nebulae...
HD209458b was discovered in 1999, becoming the first exoplanet to be discovered using the transit method: this planet’s orbit is oriented just right, so that it regularly passes in front of its star, as seen from Earth. When this happens, it blocks out a portion of the star’s light. If astronomers notice the star’s brightness dipping for a short time over and over with a consistent period, it suggests a planet is responsible. Further observations of the star’s Doppler shift...
How can Kepler’s law of planetary motion be applied to the case of geo-stationary satellite? What are the orbital parameters required to determine a satellite orbit? Name and explain them. Determine the maximum and minimum range in kilometer from an earth station to a geo-synchronous satellite. To what round trip propagation times do these correspond? Mention the effect of eclipse on the orbital motion of a satellite. Mention the effect of gravitational force due to sun and moon on the...
The discovery of pulsars –rotating neutron stars that generate regular pulses of radiation at their spin rate- was fortuitous. A group of astrophysicists from Cambridge University lead by Anthony Hewish was looking for quasars (these are extremely bright, compact and remote objects that emit up to a thousand times as much light as our entire galaxy). For that purpose the research group designed a radio-telescope that was built on the flat fields surrounding Cambridge in central England. This telescope did...
Physics Lab Assignment This particular discovery is also an example of how those who deserve an award sadly are not always the ones who receive it. Read the following passage focusing your attention on the scientific procedures and scientific abilities you have been developing throughout the course. The discovery of pulsars –rotating neutron stars that generate regular pulses of radiation at their spin rate- was fortuitous. A group of astrophysicists from Cambridge University lead by Anthony Hewish was looking for...