A-level Physics A Question paper Unit 05 - Section 2A
... 3 (b) (ii) Give reasons for your answer to part (b)(i). ...
... 3 (b) (ii) Give reasons for your answer to part (b)(i). ...
Chapter 1 Seeing the Light: The Art and Science of Astronomy
... Astronomy is the study of the sky, the science of cosmic objects and celestial happenings, and the investigation of the nature of the universe you live in. Professional astronomers carry out the business of astronomy by observing with telescopes that capture visible light from the stars or by tuning ...
... Astronomy is the study of the sky, the science of cosmic objects and celestial happenings, and the investigation of the nature of the universe you live in. Professional astronomers carry out the business of astronomy by observing with telescopes that capture visible light from the stars or by tuning ...
chap11 (WP)
... the slow increase in the star's radius with mass). So, a star several times the Sun's mass could have a much higher initial temperature. High temperatures also can be obtained in stars that have been burning for some time. At high temperatures, reactions involving the burning of nuclei like 4He and ...
... the slow increase in the star's radius with mass). So, a star several times the Sun's mass could have a much higher initial temperature. High temperatures also can be obtained in stars that have been burning for some time. At high temperatures, reactions involving the burning of nuclei like 4He and ...
18 Throughout history people around the world have looked up at
... and its revolution around the Sun, but also to enjoy literature from different cultures. I use a story that is attributed to two different tribes from eastern Canada, the Micmac and the Iroquois. The story is about seven bird hunters who track a huge bear across the sky every year. As Earth orbits t ...
... and its revolution around the Sun, but also to enjoy literature from different cultures. I use a story that is attributed to two different tribes from eastern Canada, the Micmac and the Iroquois. The story is about seven bird hunters who track a huge bear across the sky every year. As Earth orbits t ...
High resolution spectroscopy: what`s next?
... and ozone bands), the values of S/N decrease by a factor of 2. The strong absorption features at 1.06 and 1.26 µm, bands are produced by molecular oxygen (O2), and oxygen collision complexes, including collisions between O2 and N2. The broad absorption feature of the O3 Chappuis band is also clearly ...
... and ozone bands), the values of S/N decrease by a factor of 2. The strong absorption features at 1.06 and 1.26 µm, bands are produced by molecular oxygen (O2), and oxygen collision complexes, including collisions between O2 and N2. The broad absorption feature of the O3 Chappuis band is also clearly ...
No Slide Title
... • The milli-arcsecond separation between multiple images is too small to be resolved by modern telescopes. The combined light of all images is instead observed as a single image of the source • The brightness of the combined image is a function of the projected separation of the source and lens on t ...
... • The milli-arcsecond separation between multiple images is too small to be resolved by modern telescopes. The combined light of all images is instead observed as a single image of the source • The brightness of the combined image is a function of the projected separation of the source and lens on t ...
Document
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
... • Interstellar gas clouds emit intense microwaves at specific frequencies. • Doppler shift gives speed • True speed plus proper motion gives distance • Maybe 10s of Mpc but new technique ...
The Extragalactic Distance Database: Color–Magnitude Diagrams
... a temperature independent equation of state. While a star is in this phase the mass and temperature of the core continuously increase until the temperature reaches about 108 K, at which point tripleα helium burning ignites and sends the star off the RGB to the Horizontal Branch. The helium falling o ...
... a temperature independent equation of state. While a star is in this phase the mass and temperature of the core continuously increase until the temperature reaches about 108 K, at which point tripleα helium burning ignites and sends the star off the RGB to the Horizontal Branch. The helium falling o ...
OBJXlab-JCU_Alt
... Since our unknown object in this case has the spectrum of a galaxy, we identify it as such, and can then proceed to determine some of its properties from the spectrum, notably its redshift, its speed of recession from us, and its distance. If the spectrum of the object had been that of a star, we wo ...
... Since our unknown object in this case has the spectrum of a galaxy, we identify it as such, and can then proceed to determine some of its properties from the spectrum, notably its redshift, its speed of recession from us, and its distance. If the spectrum of the object had been that of a star, we wo ...
Program_files/40 Years of Microquasarsembed
... • .All powered by accretion onto a compact object (neutron star or black hole). • Roche Lobe overflow or wind? • ~20 % have been found to have radio emission ...
... • .All powered by accretion onto a compact object (neutron star or black hole). • Roche Lobe overflow or wind? • ~20 % have been found to have radio emission ...
US - Real Science
... compressing this gas so much that stars are forming at a staggering rate. Probing further into NGC 1313's interior reveals more mystery. In the midst of the starburst regions, two objects are emitting highly energetic X-rays. These are known as ultra-luminous X-ray sources (ULX). Astronomers suspect ...
... compressing this gas so much that stars are forming at a staggering rate. Probing further into NGC 1313's interior reveals more mystery. In the midst of the starburst regions, two objects are emitting highly energetic X-rays. These are known as ultra-luminous X-ray sources (ULX). Astronomers suspect ...
L157 EXTRASOLAR GIANT PLANETS UNDER STRONG STELLAR
... parent star more than quantifying the planet’s net flux. During the evolution of an irradiated planet or for a very massive closein object, Tef f 1 Teq because of the planet’s internal flux. While the above equation is a good starting approximation for Teff, more accurate Teff estimates need to be c ...
... parent star more than quantifying the planet’s net flux. During the evolution of an irradiated planet or for a very massive closein object, Tef f 1 Teq because of the planet’s internal flux. While the above equation is a good starting approximation for Teff, more accurate Teff estimates need to be c ...
Separating Stars and Galaxies Based on Color
... specifically R-z vs. J-K provides well-separated populations, making a good starting point for a star-galaxy separator. The next preliminary step was to decide on a magnitude at which to cut objects, so that there was still some separation to work with. We chose R = 20, as there was enough data to u ...
... specifically R-z vs. J-K provides well-separated populations, making a good starting point for a star-galaxy separator. The next preliminary step was to decide on a magnitude at which to cut objects, so that there was still some separation to work with. We chose R = 20, as there was enough data to u ...
Cepheid Calibration
... stage of history. Such was the contribution of Henrietta Leavitt, one of many female “computers” working at the Harvard College Observatory for small hourly wages. Her years of patiently studying astronomical photographs—from 1893 until her death in 1921—culminated in finding the missing link for me ...
... stage of history. Such was the contribution of Henrietta Leavitt, one of many female “computers” working at the Harvard College Observatory for small hourly wages. Her years of patiently studying astronomical photographs—from 1893 until her death in 1921—culminated in finding the missing link for me ...
AN OPTICAL INFRARED ASTROMETRIC - Cosmos
... determination of trigonometric parallaxes of about 120 000 stars of various kinds is epoch-making with its precision of about 1 milliarcsec. A large fraction of the catalogued stars are located within a few hundred parsecs from the sun. The accuracy of the distances determined by using the observed ...
... determination of trigonometric parallaxes of about 120 000 stars of various kinds is epoch-making with its precision of about 1 milliarcsec. A large fraction of the catalogued stars are located within a few hundred parsecs from the sun. The accuracy of the distances determined by using the observed ...
sa`d al-malik - WordPress.com
... the brightest star in Aquarius. It belongs to a rare class of stars, the yellow supergiants. Its name comes from the Arabic phrase sa’d al-suud, meaning the “luck of lucks.” Sadalmelik – α Aquarii (Alpha Aquarii) G-type (yellow) supergiant, approximately 800 light years distant. It is 3000 times mor ...
... the brightest star in Aquarius. It belongs to a rare class of stars, the yellow supergiants. Its name comes from the Arabic phrase sa’d al-suud, meaning the “luck of lucks.” Sadalmelik – α Aquarii (Alpha Aquarii) G-type (yellow) supergiant, approximately 800 light years distant. It is 3000 times mor ...
Latitude and Longitude in the Northern Hemisphere worksheet
... Everybody who comes to see for himself predictably has his photograph taken straddling the line with one foot in each hemisphere. Even reporters have been known to do it. Because clocks in the world are set in relation to Greenwich Mean Time, when you get here don’t let a minute go by. Can you think ...
... Everybody who comes to see for himself predictably has his photograph taken straddling the line with one foot in each hemisphere. Even reporters have been known to do it. Because clocks in the world are set in relation to Greenwich Mean Time, when you get here don’t let a minute go by. Can you think ...
using a cepheid variable to determine distance
... In this exercise you will use data taken from observations of a Cepheid variable star over a period of 80 days. On each day, the apparent visual magnitude was recorded. Using this data you will be able to plot a light-curve for this Cepheid, and from this light curve, determine the period of the lig ...
... In this exercise you will use data taken from observations of a Cepheid variable star over a period of 80 days. On each day, the apparent visual magnitude was recorded. Using this data you will be able to plot a light-curve for this Cepheid, and from this light curve, determine the period of the lig ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.