Astronomy
... that the Sun was at an angle of 6° south of the vertical at Alexandria at the same time that, at Syrene, 800 km south of Alexandria, the sun was observed to be exactly overhead. Based on these data, the circumference of the Earth in kilometers was measured to be 37,200 km or 23,250 miles, very close ...
... that the Sun was at an angle of 6° south of the vertical at Alexandria at the same time that, at Syrene, 800 km south of Alexandria, the sun was observed to be exactly overhead. Based on these data, the circumference of the Earth in kilometers was measured to be 37,200 km or 23,250 miles, very close ...
The gorilla connection
... and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). If the nearer star possesses a planet, it too acts as a lens, altering the light curve accordingly (Fig. 1b). This alteration can be large, even for a low-mass planet, but the deviation lasts fo ...
... and causing it to brighten and fade with a characteristic ‘light curve’ over a period of weeks (Fig. 1a). If the nearer star possesses a planet, it too acts as a lens, altering the light curve accordingly (Fig. 1b). This alteration can be large, even for a low-mass planet, but the deviation lasts fo ...
Is the Earth special
... Where are they? Ian Crawford’s (Birkbeck) talk could well be described as based upon the absence of data! Fermi’s Paradox – the question that, if there are other forms of intelligent life, then where are they? – stems from the observation that there is no evidence of any outside interference in the ...
... Where are they? Ian Crawford’s (Birkbeck) talk could well be described as based upon the absence of data! Fermi’s Paradox – the question that, if there are other forms of intelligent life, then where are they? – stems from the observation that there is no evidence of any outside interference in the ...
Astronomy Powerpoint
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
... • Stars with masses similar to the sun evolve in essentially the same way as low-mass stars. • During their collapse from red giants to white dwarfs, medium-mass stars are thought to cast off their bloated outer layer, creating an expanding round cloud of gas called planetary nebula. ...
Morning Announcements
... for you. Plot the bright stars (Table I) and near stars (Table II) in different colors by using, for instance, pencil for the bright ones and blue ink for the near ones. NOTE: The spectral class is followed by a number from 0-9 designating hottest to coolest. ...
... for you. Plot the bright stars (Table I) and near stars (Table II) in different colors by using, for instance, pencil for the bright ones and blue ink for the near ones. NOTE: The spectral class is followed by a number from 0-9 designating hottest to coolest. ...
Key words: Magnetic field, Sunspot, Polarisation, Stellar magnetism
... generate and sustain these magnetic fields. We now know that these magnetic fields in turn have a big impact on how stars behave throughout their lives. They play an important role in the complex processes of star formation. And at the other end of stellar lives, they are vital to explaining the biz ...
... generate and sustain these magnetic fields. We now know that these magnetic fields in turn have a big impact on how stars behave throughout their lives. They play an important role in the complex processes of star formation. And at the other end of stellar lives, they are vital to explaining the biz ...
How Long is a Light Year?
... While the sun is often referred to as the most important star within our solar system, it is certainly not the only one. There are too many stars for us to even begin to count (see how many you can count while gazing up at the sky on a clear night). Not only are there too many stars to count, but th ...
... While the sun is often referred to as the most important star within our solar system, it is certainly not the only one. There are too many stars for us to even begin to count (see how many you can count while gazing up at the sky on a clear night). Not only are there too many stars to count, but th ...
Spectroscopy – the study of the colors of light (the spectrum) given
... diagram astronomers must first find the star’s surface temperature. This can be done using a Plank curve or the spectrum. ...
... diagram astronomers must first find the star’s surface temperature. This can be done using a Plank curve or the spectrum. ...
Protostar formation
... on one hand, gravitational force pushes inward, while on the other hand internal pressure due to the nuclear reactions pushes outward. ...
... on one hand, gravitational force pushes inward, while on the other hand internal pressure due to the nuclear reactions pushes outward. ...
Space Study Guide
... pressures within the core of stars, atoms collide at high enough speeds to overcome the usual electromagnetic repulsion of nuclei, allowing nuclear fusion to occur. All stars live by fusing hydrogen into helium. In the first step of the process, two hydrogen atoms fuse to form deuterium. In the next ...
... pressures within the core of stars, atoms collide at high enough speeds to overcome the usual electromagnetic repulsion of nuclei, allowing nuclear fusion to occur. All stars live by fusing hydrogen into helium. In the first step of the process, two hydrogen atoms fuse to form deuterium. In the next ...
Constellation
... pearls' surrounding an Exploding Star Two decades ago, astronomers spotted one of the brightest exploding stars in more than 400 years. This image shows the entire region around the supernova. The most prominent feature in the image is a ring with dozens of bright spots. A shock wave of material unl ...
... pearls' surrounding an Exploding Star Two decades ago, astronomers spotted one of the brightest exploding stars in more than 400 years. This image shows the entire region around the supernova. The most prominent feature in the image is a ring with dozens of bright spots. A shock wave of material unl ...
the life cycles of stars (5) - U3A Bendigo Courses / Activities
... The main sequence life burning hydrogen lasts only 100 million years instead of 10 billion for the sun. These are O and B type stars. Even before leaving the main sequence these stars emit material from their surface due to sheer radiation pressure. The strong light radiation carries gas with it. Ou ...
... The main sequence life burning hydrogen lasts only 100 million years instead of 10 billion for the sun. These are O and B type stars. Even before leaving the main sequence these stars emit material from their surface due to sheer radiation pressure. The strong light radiation carries gas with it. Ou ...
1. Stellar Evolution – Notes Astronomers classify stars according to
... bottom and gets brighter towards the top. This places the cooler, dimmer stars towards the lower right and the hotter, more luminous stars at the upper left. Our own star, the Sun, is nearly in the middle of both the temperature and luminosity scales relative to other stars. This puts it around the ...
... bottom and gets brighter towards the top. This places the cooler, dimmer stars towards the lower right and the hotter, more luminous stars at the upper left. Our own star, the Sun, is nearly in the middle of both the temperature and luminosity scales relative to other stars. This puts it around the ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... Transient Events (in time) also occur ...
... Transient Events (in time) also occur ...
title of lesson plan - Discovery Education
... in the class will present a written and oral report about a planet. Presentations should include photos, illustrations, and any other multimedia materials that groups wish to present. Student groups should create materials that can be part of a class solar system display. ...
... in the class will present a written and oral report about a planet. Presentations should include photos, illustrations, and any other multimedia materials that groups wish to present. Student groups should create materials that can be part of a class solar system display. ...
Star Questions 2008 - Fort Thomas Independent Schools
... What does it mean for a star to have a life cycle? Explain what it means for a star to be on the main sequence. Which two pressures act upon any star on the main sequence? Why a star remains roughly the same diameter when on the main sequence. Explain the following relationships: a. Surface temperat ...
... What does it mean for a star to have a life cycle? Explain what it means for a star to be on the main sequence. Which two pressures act upon any star on the main sequence? Why a star remains roughly the same diameter when on the main sequence. Explain the following relationships: a. Surface temperat ...
The Electromagnetic Spectrum
... you. • The train has a lower pitch when moving away from you. • This Doppler Effect is caused by compression or stretching of sound waves. • The same phenomenon occurs with light, only the ...
... you. • The train has a lower pitch when moving away from you. • This Doppler Effect is caused by compression or stretching of sound waves. • The same phenomenon occurs with light, only the ...
Star Basics
... The spectra of O-Type stars shows the presence of hydrogen and helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can i ...
... The spectra of O-Type stars shows the presence of hydrogen and helium. At these temperatures most of the hydrogen is ionized, so the hydrogen lines are weak. Both HeI and HeII (singly ionized helium) are seen in the higher temperature examples. The radiation from O5 stars is so intense that it can i ...
August 2015 - Shasta Astronomy Club
... other things being equal, more gravity means it can hold on to more gas, so the air there could be much thicker. If so—and remembering it’s receiving more light and heat from its star than we do—it might be suffering a runaway greenhouse effect. Or, it may not have any air at all. Or or or. Without ...
... other things being equal, more gravity means it can hold on to more gas, so the air there could be much thicker. If so—and remembering it’s receiving more light and heat from its star than we do—it might be suffering a runaway greenhouse effect. Or, it may not have any air at all. Or or or. Without ...
High School Science Essential Curriculum - Astronomy
... Investigate research methods used to analyze a typical star, such as solar neutrino detectors, helioseismology, spectroscopy, and Doppler shift detections of extrasolar planets. ...
... Investigate research methods used to analyze a typical star, such as solar neutrino detectors, helioseismology, spectroscopy, and Doppler shift detections of extrasolar planets. ...