1 Introduction - University of Amsterdam
... role of massive stars in our universe – it is pivotal to understand the formation and evolution of massive stars. Perhaps surprisingly so, little is known about these processes. The formation of massive stars – rare events in the present-day universe – takes place deep inside dusty interstellar clou ...
... role of massive stars in our universe – it is pivotal to understand the formation and evolution of massive stars. Perhaps surprisingly so, little is known about these processes. The formation of massive stars – rare events in the present-day universe – takes place deep inside dusty interstellar clou ...
A Comet-Hunter`s Legacy -
... orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star formation caused by their gravitational interaction. M81's bright spiral arms are the ...
... orbiting each other about once every hundred million years, probably as a result of a near-collision about six hundred million years in the past; and each time they pass by each other, they undergo episodes of star formation caused by their gravitational interaction. M81's bright spiral arms are the ...
P10263v1.2 Lab 6 Text
... cluster. That information translated into an estimate of the absolute luminosity. Combined with the measured apparent luminosity and an estimate of “X”, we were able to find the distance to that cluster. Finding the distance to other galaxies, however, can be a bit more difficult. Whereas the Pleiad ...
... cluster. That information translated into an estimate of the absolute luminosity. Combined with the measured apparent luminosity and an estimate of “X”, we were able to find the distance to that cluster. Finding the distance to other galaxies, however, can be a bit more difficult. Whereas the Pleiad ...
Hypervelocity Globular: A beacon of merging clusters Oleg Gnedin with Alexey Vikhlinin
... requires different acceleration mechanism • Likely belongs to the globular cluster system of M86 group, which is merging head-on with the Virgo cluster: significant probability of reaching the observed velocity • Extreme negative velocity outliers are signposts of cluster ...
... requires different acceleration mechanism • Likely belongs to the globular cluster system of M86 group, which is merging head-on with the Virgo cluster: significant probability of reaching the observed velocity • Extreme negative velocity outliers are signposts of cluster ...
Photometry – I. “All sky”
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
... years, you might not even be able to get the same glass that was used previously. Detectors are also not really uniform; CCDs are much more red-sensitive than photomultipliers and different types (of either) might have significantly different responses as a function of wavelength. At the same time, ...
April 2016 - Newbury Astronomical Society
... solid black line marked as: ‘North Celestial Pole’ and ‘South Celestial Pole’ is the tilted axis of rotation of Earth. The angle between Solar System axis and the Celestial Axis (Earth’s axis of rotation) marked as: ‘Axial tilt or Obliquity’ is the 23.4° tilt as discussed on the previous pages. The ...
... solid black line marked as: ‘North Celestial Pole’ and ‘South Celestial Pole’ is the tilted axis of rotation of Earth. The angle between Solar System axis and the Celestial Axis (Earth’s axis of rotation) marked as: ‘Axial tilt or Obliquity’ is the 23.4° tilt as discussed on the previous pages. The ...
A Stars
... • Astronomers noticed that stellar spectra showed many similarities. • Can stars be classified by their spectra? • Draper Survey at Harvard (1886-1897): – Objective Prism Photography – obtained spectra of >100,000 stars – hired women as “computers” to analyze spectra ASTR111 Lecture 13 ...
... • Astronomers noticed that stellar spectra showed many similarities. • Can stars be classified by their spectra? • Draper Survey at Harvard (1886-1897): – Objective Prism Photography – obtained spectra of >100,000 stars – hired women as “computers” to analyze spectra ASTR111 Lecture 13 ...
Lesson Plan A2 The Year and Seasons
... “looks out” in all the directions of a circle over the course of the year. Our nighttime view of the stars changes through the year. In summer we look out in one direction at certain constellations. Six months later, we have moved around in our orbit to the other side of the Sun. At night we now loo ...
... “looks out” in all the directions of a circle over the course of the year. Our nighttime view of the stars changes through the year. In summer we look out in one direction at certain constellations. Six months later, we have moved around in our orbit to the other side of the Sun. At night we now loo ...
Word version
... days—to complete. Careful observers learned to count out these days and created the first calendars. Solar and lunar cycles don’t line up precisely, however: the 29 and a half days of a lunar month do not fit evenly into the 365 days of the solar year. A calendar based on the moon will shift by abou ...
... days—to complete. Careful observers learned to count out these days and created the first calendars. Solar and lunar cycles don’t line up precisely, however: the 29 and a half days of a lunar month do not fit evenly into the 365 days of the solar year. A calendar based on the moon will shift by abou ...
Stellar Evolution – Cosmic Cycles of Formation and Destruction
... nebula. They are usually blue because the scattering is more efficient for blue light by the dust particles. The Witch Head Nebula to the left is a reflection nebula, and is also glowing due to the ultraviolet radiation from the nearby hot, blue massive star Rigel in the constellation of Orion. Abso ...
... nebula. They are usually blue because the scattering is more efficient for blue light by the dust particles. The Witch Head Nebula to the left is a reflection nebula, and is also glowing due to the ultraviolet radiation from the nearby hot, blue massive star Rigel in the constellation of Orion. Abso ...
Manual - TUM
... the celestial north pole. The declination is equivalent to earth’s latitude, with the slight difference of ranging not from 90◦ N to 90◦ S, but from +90◦ to -90◦ . It is also measured in degrees and is subdivided into 60 arcminutes which are subdivided into 60 arcseconds respectively. The longitude ...
... the celestial north pole. The declination is equivalent to earth’s latitude, with the slight difference of ranging not from 90◦ N to 90◦ S, but from +90◦ to -90◦ . It is also measured in degrees and is subdivided into 60 arcminutes which are subdivided into 60 arcseconds respectively. The longitude ...
Comments
... Hbeta, Mg_b, & Fe5335) with evolutionary stellar population models to derive lightaveraged ages, metallicities and the element abundance ratios Mg/Fe. We find that all these three stellar parameters of the distant galaxies obey a scaling with velocity dispersion (mass) which is very well consistent ...
... Hbeta, Mg_b, & Fe5335) with evolutionary stellar population models to derive lightaveraged ages, metallicities and the element abundance ratios Mg/Fe. We find that all these three stellar parameters of the distant galaxies obey a scaling with velocity dispersion (mass) which is very well consistent ...
June 2010 - Denver Astronomical Society
... moon, Charon, is mad, too. When you’re through looking at Mizar and Alcor, the double star at the bend of the Big Dipper’s handle (called the Horse and Rider by American Indians), you might want to wander a bit east to find the face-on spiral galaxy M101. Mizar and the star at the end star of the h ...
... moon, Charon, is mad, too. When you’re through looking at Mizar and Alcor, the double star at the bend of the Big Dipper’s handle (called the Horse and Rider by American Indians), you might want to wander a bit east to find the face-on spiral galaxy M101. Mizar and the star at the end star of the h ...
Goal: To understand how to find the brightness of stars and what
... to be first magnitude. • The next brightest was 2nd magnitude. • And so on – and we can see down to about 6 or 7th magnitude in a “dark” sky with our naked eye. ...
... to be first magnitude. • The next brightest was 2nd magnitude. • And so on – and we can see down to about 6 or 7th magnitude in a “dark” sky with our naked eye. ...
Astronomy 112: The Physics of Stars Class 19 Notes: The Stellar
... older stellar population. Given a bunch of stars in an HR diagram this technique can get quite sophisticated. An example is a recent paper by Williams et al. that used this method to determine the star formation history in different parts of a nearby galaxy. They divided the galaxy into annuli, and ...
... older stellar population. Given a bunch of stars in an HR diagram this technique can get quite sophisticated. An example is a recent paper by Williams et al. that used this method to determine the star formation history in different parts of a nearby galaxy. They divided the galaxy into annuli, and ...
PowerPoint Presentation - Center for Gravitational Wave Physics
... White Dwarf of Carbon/Oxygen ...
... White Dwarf of Carbon/Oxygen ...
PH607 – Galaxies
... The Hercules Cluster (below), about 200 Mpc distant. This cluster is loaded with gas and dust rich, star forming, spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars. Colours in the composite image show the star forming galaxies with a ...
... The Hercules Cluster (below), about 200 Mpc distant. This cluster is loaded with gas and dust rich, star forming, spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars. Colours in the composite image show the star forming galaxies with a ...
Name - CLC Charter School
... exploding, as an effect of the large transfer of matter and energy, there is a very different kind of star left. This star is called a spinning neutron star. Neutron stars produce radio waves in a steady stream or in random bursts. But if a star is massive enough, it can leave behind something more. ...
... exploding, as an effect of the large transfer of matter and energy, there is a very different kind of star left. This star is called a spinning neutron star. Neutron stars produce radio waves in a steady stream or in random bursts. But if a star is massive enough, it can leave behind something more. ...
8-4.9 - S2TEM Centers SC
... the galaxies and the constellations in which they reside on the other side. Explain that some of these galaxies are very similar to the Milky Way galaxy and others are not. All galaxies, however, are composed of stars, dust, and gas. Tell students that they are going to sort or order the cards based ...
... the galaxies and the constellations in which they reside on the other side. Explain that some of these galaxies are very similar to the Milky Way galaxy and others are not. All galaxies, however, are composed of stars, dust, and gas. Tell students that they are going to sort or order the cards based ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.