here - Lund Observatory
... over the main sequence evolution of the Sun. We can assume that the (initial) hydrogen abundance is X = 0.73 and that each helium nucleus formed weighs 0.7 % less than the four protons, from which it was formed. a) How much mass does the Sun loose per second due to hydrogen burning? b) How much of t ...
... over the main sequence evolution of the Sun. We can assume that the (initial) hydrogen abundance is X = 0.73 and that each helium nucleus formed weighs 0.7 % less than the four protons, from which it was formed. a) How much mass does the Sun loose per second due to hydrogen burning? b) How much of t ...
Class 2 Solar System Characteristics Formation Exosolar Planets
... The Great Dark Spot, discovered by Voyager 2 in 1989, is comparable in size to Earth. Jovian planets share many atmospheric features: Jupiter's Great Red Spot is about twice the size. ...
... The Great Dark Spot, discovered by Voyager 2 in 1989, is comparable in size to Earth. Jovian planets share many atmospheric features: Jupiter's Great Red Spot is about twice the size. ...
The Hertzsprung – Russell Diagram Star Data Table
... Danish astronomer Ejnar Hertzsprung and American astronomer Henry Russell discovered a relationship between the brightness of a star and the surface temperature of a star. The graph of a star’s absolute magnitude versus its temperature is called an ...
... Danish astronomer Ejnar Hertzsprung and American astronomer Henry Russell discovered a relationship between the brightness of a star and the surface temperature of a star. The graph of a star’s absolute magnitude versus its temperature is called an ...
ppt
... • From there we can calculate how much further away the star must be than the Sun to make it the brightness we see from Earth • Delta Cephei shows has a period of about 5 days • This is a reasonably bright star in the constellation of Cepheus • Cepheids are in other galaxies also, and used similarly ...
... • From there we can calculate how much further away the star must be than the Sun to make it the brightness we see from Earth • Delta Cephei shows has a period of about 5 days • This is a reasonably bright star in the constellation of Cepheus • Cepheids are in other galaxies also, and used similarly ...
Binary Star Systems Discussion Points 1. What characteristic of a
... Use the light curves for six eclipsing binary star systems on the next page to answer the rest of the questions. 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one anot ...
... Use the light curves for six eclipsing binary star systems on the next page to answer the rest of the questions. 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one anot ...
Stars and Galaxies
... And then there’s M31, the Andromeda galaxy — the most distant object that’s readily visible to human eyes. This great amalgamation of stars stands almost directly overhead late this evening. When viewed from a dark skywatching location, far from city lights, it looks like a faint, fuzzy blob. But th ...
... And then there’s M31, the Andromeda galaxy — the most distant object that’s readily visible to human eyes. This great amalgamation of stars stands almost directly overhead late this evening. When viewed from a dark skywatching location, far from city lights, it looks like a faint, fuzzy blob. But th ...
8-3-Star_Classification STUDENT
... In the night sky, a band of stars can be seen across the sky as a blurry image. When you see this, you are looking into the part of the galaxy with more stars. ...
... In the night sky, a band of stars can be seen across the sky as a blurry image. When you see this, you are looking into the part of the galaxy with more stars. ...
Measuring Distances Beyond the Solar System The Characteristics
... The Luminosity of a star is measured by comparing it with the luminosity of the Sun, which is assigned a luminosity of 1. Sirius, the brightest star in the night sky found in the constellation of Canis Major, has a luminosity of 22. This means Sirius gives off 22 times more energy each second than ...
... The Luminosity of a star is measured by comparing it with the luminosity of the Sun, which is assigned a luminosity of 1. Sirius, the brightest star in the night sky found in the constellation of Canis Major, has a luminosity of 22. This means Sirius gives off 22 times more energy each second than ...
Life Cycle of a Star
... Heat and pressure begin to build until __________ __________ begins to take place. Inside the core, _____________ atoms smash together and are fused into heavier _____________ atoms. This process generates an enormous amount of ______________ and the star ignites becoming a _________ ______________ ...
... Heat and pressure begin to build until __________ __________ begins to take place. Inside the core, _____________ atoms smash together and are fused into heavier _____________ atoms. This process generates an enormous amount of ______________ and the star ignites becoming a _________ ______________ ...
CHAPTER 2 NOTES (STARS AND GALAXIES)
... Constellations- groups of stars in which people at one time thought they saw imaginary figures of animals and people: ex Ursa Minor (Little Bear)- containing the Polaris (North Star) Orion (Hunter)- containing the bright supergiant stars, Betelgeuse and Rigel Siruis (Dog Star)- middle sized star, wh ...
... Constellations- groups of stars in which people at one time thought they saw imaginary figures of animals and people: ex Ursa Minor (Little Bear)- containing the Polaris (North Star) Orion (Hunter)- containing the bright supergiant stars, Betelgeuse and Rigel Siruis (Dog Star)- middle sized star, wh ...
Homework Problems for Quiz 1 – AY 5 – Spring 2013
... 1. If the Earth’s spin axis was not tilted with respect to the Earth’s orbital plane (around the Sun), which of the following would be true, which false?: The number of daylight hours in a day would not change through the year. The length of a day would increase from 24 hours to 365 days The change ...
... 1. If the Earth’s spin axis was not tilted with respect to the Earth’s orbital plane (around the Sun), which of the following would be true, which false?: The number of daylight hours in a day would not change through the year. The length of a day would increase from 24 hours to 365 days The change ...
Stars Unit 1-2: Stars
... • Using light-years, Alpha Centauri can be expressed as being 4.3 light-years away. – Sirius is 9 light-years away. – Vega, the brightest summertime star, is 27 lightyears away. – Polaris, the North Star, is 680 light-years away. – The Milky Way Galaxy is about 100,000 lightyears across. ...
... • Using light-years, Alpha Centauri can be expressed as being 4.3 light-years away. – Sirius is 9 light-years away. – Vega, the brightest summertime star, is 27 lightyears away. – Polaris, the North Star, is 680 light-years away. – The Milky Way Galaxy is about 100,000 lightyears across. ...
Review Day
... The atmosphere that surrounds the sun is made of three layers: Photosphere: Area where light is given off and lowest portion of the atmosphere. Chromosphere: Area beyond the photosphere. Corona: Only visible portion of the sun during an eclipse and the furthest layer from the core. ...
... The atmosphere that surrounds the sun is made of three layers: Photosphere: Area where light is given off and lowest portion of the atmosphere. Chromosphere: Area beyond the photosphere. Corona: Only visible portion of the sun during an eclipse and the furthest layer from the core. ...
A Solar System is Born 4/29/11
... • Hubble image of protoplanetary discs in the Orion Nebula, a light-years-wide "stellar nursery" probably very similar to the primordial nebula from which our Sun formed. ...
... • Hubble image of protoplanetary discs in the Orion Nebula, a light-years-wide "stellar nursery" probably very similar to the primordial nebula from which our Sun formed. ...
Document
... A NASA telescope taking a nose count of planets in one small neighborhood of the Milky Way registered more than 1,200 candidates, including 58 residing in life-friendly orbits around their parent stars. The census, collected by NASA's Kepler Space Telescope after just four months of work, shows that ...
... A NASA telescope taking a nose count of planets in one small neighborhood of the Milky Way registered more than 1,200 candidates, including 58 residing in life-friendly orbits around their parent stars. The census, collected by NASA's Kepler Space Telescope after just four months of work, shows that ...
Document
... You know that Tan(Ø ) = d/D Today we have accurate parallaxes for about 10,000 stars. ...
... You know that Tan(Ø ) = d/D Today we have accurate parallaxes for about 10,000 stars. ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.