Globular Clusters
... • M13 and M5 • Nickel 40 Inch Reflector Telescope at Lick Observatory on Mt. Hamilton • Remote observing through video conference with Ellie Gates • Digital detector called a charge coupled device (CCD) • CCDs can detect photons but not color so we used filters to detect photons of different wavelen ...
... • M13 and M5 • Nickel 40 Inch Reflector Telescope at Lick Observatory on Mt. Hamilton • Remote observing through video conference with Ellie Gates • Digital detector called a charge coupled device (CCD) • CCDs can detect photons but not color so we used filters to detect photons of different wavelen ...
Basic Patterns and Motions in the Sky
... o Altitude – Angle above or below the horizon Above: + (you can see it) Middle: 0º (The horizon itself) Below: – (you can’t see it) o Azimuth – Angle around the celestial sphere: North: 0º/360º azimuth East: 90º azimuth South: 180º azimuth West: 270º azimuth These 4 direction can be ...
... o Altitude – Angle above or below the horizon Above: + (you can see it) Middle: 0º (The horizon itself) Below: – (you can’t see it) o Azimuth – Angle around the celestial sphere: North: 0º/360º azimuth East: 90º azimuth South: 180º azimuth West: 270º azimuth These 4 direction can be ...
society journal - Auckland Astronomical Society
... nebula and its surrounding companions. Then he has presented it well, leaving some darker area around it to set off the nebula. ...
... nebula and its surrounding companions. Then he has presented it well, leaving some darker area around it to set off the nebula. ...
Measuring Stars
... Hydrogen Spectrum Star B is A) Made of two kinds of hydrogen B) Moving away from us AND moving towards us C) Actually two stars moving at different speeds ...
... Hydrogen Spectrum Star B is A) Made of two kinds of hydrogen B) Moving away from us AND moving towards us C) Actually two stars moving at different speeds ...
Lecture 31: The Properties of Stars
... The Hertzsprung-Russell (HR) Diagram plots luminosity vs. temperature, dividing stars into main-sequence and giants. ...
... The Hertzsprung-Russell (HR) Diagram plots luminosity vs. temperature, dividing stars into main-sequence and giants. ...
upperMS - CWRU Astronomy
... lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but if it loses much more, then its luminosity will be too low Often present in young clusters ...
... lifetime If 40% of the remaining mass can be removed in the final 85% of the lifetime, then it’s a nitrogen rich star It’s ok to lose this much mass and still be OB, but if it loses much more, then its luminosity will be too low Often present in young clusters ...
Lecture 24 - Empyrean Quest Publishers
... How bright (L in watts)? Luminosity at the source is determined from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightnes ...
... How bright (L in watts)? Luminosity at the source is determined from apparent brightness and distance (d). Apparent magnitude (old way). We can see about 1,000 stars in Northern Hemisphere with naked eye. Hipparchus rated them from 1 to 6. A '1' is 2.52 x brighter than a '2', etc. Range in brightnes ...
Distances in space
... imagine a light year which light travels no stop for a year. The Andromida Galaxy is 2,000,000 light years which means light has to travel 2,000,000 years to get there. A light year is so big that it takes about 63,000 AU to equal 1 light-year. The distances in space are very great things are really ...
... imagine a light year which light travels no stop for a year. The Andromida Galaxy is 2,000,000 light years which means light has to travel 2,000,000 years to get there. A light year is so big that it takes about 63,000 AU to equal 1 light-year. The distances in space are very great things are really ...
ASTR 553/554 (1) : Questions
... Galaxy disks often have exponential surface brightness profiles: I(R) = I(0) exp(-R/Rd), where Rd is the disk (e-folding) "scale length", and I(0) is the central surface brightness. Recall, the units of I(R) are L pc-2. For example, the disk of the Milky Way has Rd = 3.5 kpc, and I(R) at the solar r ...
... Galaxy disks often have exponential surface brightness profiles: I(R) = I(0) exp(-R/Rd), where Rd is the disk (e-folding) "scale length", and I(0) is the central surface brightness. Recall, the units of I(R) are L pc-2. For example, the disk of the Milky Way has Rd = 3.5 kpc, and I(R) at the solar r ...
Handout Life of Stars
... variety of atoms we see in the universe around us. The Sun’s own gravity traps and squeezes this ultra-hot gas into a confined space, thus generating enough heat for the fusion reaction to take place. The process remains in equilibrium as long as it retains enough fuel to create this heat- and light ...
... variety of atoms we see in the universe around us. The Sun’s own gravity traps and squeezes this ultra-hot gas into a confined space, thus generating enough heat for the fusion reaction to take place. The process remains in equilibrium as long as it retains enough fuel to create this heat- and light ...
Lecture17
... How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
... How can this be? They emit less light per square meter than a blue main sequence star, but, they are much, much bigger (more square meters)! ...
Navigating by the Stars
... What is an ellipse? Glad you asked. An ellipse is a closed, curved shape that is defined by two foci. An ellipse is a like a flattened circle. In fact, if both of the foci of an ellipse are at the same point, an ellipse becomes a circle! If you think about it, the relationship between an ellipse and ...
... What is an ellipse? Glad you asked. An ellipse is a closed, curved shape that is defined by two foci. An ellipse is a like a flattened circle. In fact, if both of the foci of an ellipse are at the same point, an ellipse becomes a circle! If you think about it, the relationship between an ellipse and ...
Star in a Box Worksheet - Beginning
... 1. Describe how the Sun changes over its lifetime. 2. When will the Sun be at its brightest? 3. When will the Sun be at its hottest? 4. In which stage of its life does the Sun spend the longest time? 5. In which stage of life will the Sun undergo the most change? 6. What kind of star will the Sun be ...
... 1. Describe how the Sun changes over its lifetime. 2. When will the Sun be at its brightest? 3. When will the Sun be at its hottest? 4. In which stage of its life does the Sun spend the longest time? 5. In which stage of life will the Sun undergo the most change? 6. What kind of star will the Sun be ...
Today`s Powerpoint
... - billions of years old Clusters are crucial for stellar evolution studies because: 1) All stars in a cluster formed at about same time (so all have same age) 2) All stars are at about the same distance 3) All stars have same chemical composition ...
... - billions of years old Clusters are crucial for stellar evolution studies because: 1) All stars in a cluster formed at about same time (so all have same age) 2) All stars are at about the same distance 3) All stars have same chemical composition ...
IAUS 298: Setting the Scene for Gaia and LAMOST, The current and
... • Why do we still build and run medium-size facilities as purely national tools when the rest of astronomy is so fully international? The meeting was separated in different sessions that I detail next (although they do not follow the program order!). 1) THE MILKY WAY AS WE KNOW IT ...
... • Why do we still build and run medium-size facilities as purely national tools when the rest of astronomy is so fully international? The meeting was separated in different sessions that I detail next (although they do not follow the program order!). 1) THE MILKY WAY AS WE KNOW IT ...
Chapter 19 Star Formation
... At stage 6, the core reaches 10 million K, and nuclear fusion begins. The protostar has become a star. The star continues to contract and increase in temperature until it is in equilibrium: Internal pressure force outward, balancing the inward force of gravity, at every layer of the star’s interior. ...
... At stage 6, the core reaches 10 million K, and nuclear fusion begins. The protostar has become a star. The star continues to contract and increase in temperature until it is in equilibrium: Internal pressure force outward, balancing the inward force of gravity, at every layer of the star’s interior. ...
Galaxies - cloudfront.net
... _____ 1. There are a total of about 5 million galaxies in the universe. _____ 2. Star clusters contain greater numbers of stars than galaxies do. _____ 3. The Pleiades, or Seven Sisters, is an example of a star cluster. _____ 4. Globular clusters have a lot of dust in addition to stars. _____ 5. The ...
... _____ 1. There are a total of about 5 million galaxies in the universe. _____ 2. Star clusters contain greater numbers of stars than galaxies do. _____ 3. The Pleiades, or Seven Sisters, is an example of a star cluster. _____ 4. Globular clusters have a lot of dust in addition to stars. _____ 5. The ...
A Triple Conjunction
... I am sceptical because the March 17th 6 BC occultation took place very close to the Sun and just after sunset. It is hard to believe that it would have been observable with the Sun just 3 degrees below the horizon and Jupiter 5 degrees above it. This theory though has been very well received by man ...
... I am sceptical because the March 17th 6 BC occultation took place very close to the Sun and just after sunset. It is hard to believe that it would have been observable with the Sun just 3 degrees below the horizon and Jupiter 5 degrees above it. This theory though has been very well received by man ...
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.