Stars
... amount of energy, but there are billions of reactions per second. Each second, the Sun produces 4 × 1026 joules of energy. It would take 2,000 million nuclear power plants a whole year to produce the same amount of energy on Earth. In the Sun, and in most stars, hydrogen atoms fuse together to form ...
... amount of energy, but there are billions of reactions per second. Each second, the Sun produces 4 × 1026 joules of energy. It would take 2,000 million nuclear power plants a whole year to produce the same amount of energy on Earth. In the Sun, and in most stars, hydrogen atoms fuse together to form ...
Astronomical co-ordinates
... The constant of refraction can be measured by using the transits of a circumpolar star. Refraction depends on the wavelength of the light observed. ...
... The constant of refraction can be measured by using the transits of a circumpolar star. Refraction depends on the wavelength of the light observed. ...
Astrophysics
... star (from the inverse square law). This is normally called the luminosity of the star and is measured in watts. It is basically the power output of the star! But how do we measure the power output of a star?! • Actually it is not so difficult! We know that we receive about 1 kW/m² from the Sun. In ...
... star (from the inverse square law). This is normally called the luminosity of the star and is measured in watts. It is basically the power output of the star! But how do we measure the power output of a star?! • Actually it is not so difficult! We know that we receive about 1 kW/m² from the Sun. In ...
What is a Star?
... Small Stars- The Life of a Star of about one Solar Mass. Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. ...
... Small Stars- The Life of a Star of about one Solar Mass. Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. ...
Our colour this month is black. Our shape is a crescent. Our topic this
... Our key words during discussion time will be : the solar system, sky, outer space, stars, sun, planets, orbit, circling, asteroids, comets, moons, galaxy, milky way, air, astronauts, gravity, full moon , crescent moon, total eclipse. ...
... Our key words during discussion time will be : the solar system, sky, outer space, stars, sun, planets, orbit, circling, asteroids, comets, moons, galaxy, milky way, air, astronauts, gravity, full moon , crescent moon, total eclipse. ...
Cartwheel Galaxy - Chandra X
... Figure 7: Credit: X-ray: NASA/CXC/MIT/S.Rappaport et al, Optical: NASA/STScI From observations of objects such as the Cartwheel Galaxy, scientists have seen that a collision between galaxies may trigger a spectacular burst of star formation in galaxies having a high gas content. In July of 2011, Cha ...
... Figure 7: Credit: X-ray: NASA/CXC/MIT/S.Rappaport et al, Optical: NASA/STScI From observations of objects such as the Cartwheel Galaxy, scientists have seen that a collision between galaxies may trigger a spectacular burst of star formation in galaxies having a high gas content. In July of 2011, Cha ...
Journey Through the Universe By Brian Fontaine
... But earth is just a speck, a million times smaller than the sun, but only 8 light-minutes from it, traveling at light speed (186,000 miles per second) ...
... But earth is just a speck, a million times smaller than the sun, but only 8 light-minutes from it, traveling at light speed (186,000 miles per second) ...
Astronomy news
... seven nearby, INSs discovered with ROSAT and often dubbed XDINS. RX J1856.5-3754 received particular interest since it is the brightest XDIN, its X-ray flux doesn’t show any apparent contamination from non thermal magnetospheric emission, and a parallactic distance (117 12 pc) has been reported. It ...
... seven nearby, INSs discovered with ROSAT and often dubbed XDINS. RX J1856.5-3754 received particular interest since it is the brightest XDIN, its X-ray flux doesn’t show any apparent contamination from non thermal magnetospheric emission, and a parallactic distance (117 12 pc) has been reported. It ...
about Stars
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
... • Astronomers quantify the “color” of a star by using the difference in brightness between the brightness in the B and V spectral regions • The B-V color is related to the slope of the ...
General Introduction 1. Luminosity, Flux and Magnitude The
... The evolution of the Sun is shown schematically in Fig. 7.3. The red giant phase occurs after the interior of the Sun is exhausted of hydrogen and helium burning initiates. The Sun is not massive enough to burn elements beyond He, so after shedding roughly half its mass in a violent wind leading to ...
... The evolution of the Sun is shown schematically in Fig. 7.3. The red giant phase occurs after the interior of the Sun is exhausted of hydrogen and helium burning initiates. The Sun is not massive enough to burn elements beyond He, so after shedding roughly half its mass in a violent wind leading to ...
Lecture Notes – Galaxies
... Clusters of Galaxies Contain from 10 – 1000s of galaxies, and are gravitationally bound systems. Spacing of galaxies is realtively close, ≈ 100 times diameter of galaxy. (For comparison, in our Galaxy the spacing of stars ≈ 106 diameter of a typical star.) Rich clusters (> 100 members) contain mostl ...
... Clusters of Galaxies Contain from 10 – 1000s of galaxies, and are gravitationally bound systems. Spacing of galaxies is realtively close, ≈ 100 times diameter of galaxy. (For comparison, in our Galaxy the spacing of stars ≈ 106 diameter of a typical star.) Rich clusters (> 100 members) contain mostl ...
ASTRONOMY AND ASTROPHYSICS Letter to the Editor Low
... of 0.00 074. The effective exposure times of the final broadband images in the central 2.0 5 × 2.0 5 is 37, 45, and 48 minutes in Js , H, and Ks , respectively. Fig. 1 shows the impressive 3-colour composite image. The brightest star in the FOV (8000 northeast of the core) is the red supergiant IRS ...
... of 0.00 074. The effective exposure times of the final broadband images in the central 2.0 5 × 2.0 5 is 37, 45, and 48 minutes in Js , H, and Ks , respectively. Fig. 1 shows the impressive 3-colour composite image. The brightest star in the FOV (8000 northeast of the core) is the red supergiant IRS ...
observing cards - NC Science Festival
... small & round and possibly planet-like through primitive telescopes. It was very quickly recognized that these were not planets, but the name stuck. The planetary nebula phase of a star’s life represents a short but important time in the life of stars up to 8 times the mass of our Sun. If we compare ...
... small & round and possibly planet-like through primitive telescopes. It was very quickly recognized that these were not planets, but the name stuck. The planetary nebula phase of a star’s life represents a short but important time in the life of stars up to 8 times the mass of our Sun. If we compare ...
The Basics of the Universe
... material - assuming that we can obtain any - has as much mass as Mount Everest. Some of these are called magnetars, while others are called pulsars. Neutron stars spin very rapidly, and this causes them to have very strong magnetic fields, and the ones with the strongest are called magnetars. Pulsar ...
... material - assuming that we can obtain any - has as much mass as Mount Everest. Some of these are called magnetars, while others are called pulsars. Neutron stars spin very rapidly, and this causes them to have very strong magnetic fields, and the ones with the strongest are called magnetars. Pulsar ...
O star
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
... spectral type and the luminosity class of a star from its spectrum. This is extraordinarily valuable, as it means that, just from the spectrum of a star, one can plot it in on the H-R diagram. BUT: if you can plot a star on the H-R diagram, you know its absolute magnitude! And if you know its absolu ...
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.