What we can measure
... more sophisticated measuring devices than the eye, we noted that the original five units of apparent magnitude corresponded to 100 times in brightness. Thus we could extend the brightness system (apparent magnitude) down in brightness but up in value from 1 to 5 all the way to 1 to 15. (At this poin ...
... more sophisticated measuring devices than the eye, we noted that the original five units of apparent magnitude corresponded to 100 times in brightness. Thus we could extend the brightness system (apparent magnitude) down in brightness but up in value from 1 to 5 all the way to 1 to 15. (At this poin ...
IND 6 - 1 Stars and Stellar Evolution In order to better understand
... A low mass star (less than 8 times the mass of our Sun ( < 8 Msun)) eventually ejects its outer layers to produce a planetary nebula. The now naked stellar core remaining is called a white dwarf (because it is very hot but dim). In contrast, a high-mass star, more than 8 times the mass of our Su ...
... A low mass star (less than 8 times the mass of our Sun ( < 8 Msun)) eventually ejects its outer layers to produce a planetary nebula. The now naked stellar core remaining is called a white dwarf (because it is very hot but dim). In contrast, a high-mass star, more than 8 times the mass of our Su ...
February 2010 Vol 21 No 2 - Cape Cod Astronomical Society
... The Great Orion Nebula was spectacular in the 16”. Not as much “depth” as one can see in the 18” (which we kept inside because of the cold and the snow) but we had a spectacular and clear view of the trapezium and a seemingly darker than usual dark nebulosity to their right as we looked in the eyepi ...
... The Great Orion Nebula was spectacular in the 16”. Not as much “depth” as one can see in the 18” (which we kept inside because of the cold and the snow) but we had a spectacular and clear view of the trapezium and a seemingly darker than usual dark nebulosity to their right as we looked in the eyepi ...
April 10th
... • Most white dwarfs are composed of carbon and oxygen • Some white dwarfs have the same mass as the Sun but slightly bigger than the Earth • 200,000 times as dense as the Earth • Very dense – Some have densities of 3 million grams per cubic centimeter – A teaspoon of a white dwarf would weigh as muc ...
... • Most white dwarfs are composed of carbon and oxygen • Some white dwarfs have the same mass as the Sun but slightly bigger than the Earth • 200,000 times as dense as the Earth • Very dense – Some have densities of 3 million grams per cubic centimeter – A teaspoon of a white dwarf would weigh as muc ...
Galactic Star Formation Science with Integral Field
... – Very sensitive VLT + SINFONI observations – 170+ Emission lines detected – Many very high excitation lines of H2 and [Fe II] – Bow-shock apex shows extremely high temperature T~6000K - revealing that the H2 molecule persists in these very high temperature regions Giannini et al. “Near-infrared, IF ...
... – Very sensitive VLT + SINFONI observations – 170+ Emission lines detected – Many very high excitation lines of H2 and [Fe II] – Bow-shock apex shows extremely high temperature T~6000K - revealing that the H2 molecule persists in these very high temperature regions Giannini et al. “Near-infrared, IF ...
All_Stars
... • Eventually, the entire envelope is ejected as a planetary nebula, leaving behind its hot, degenerate core: a white dwarf • The expanding envelope is ionized by UV photons from the hot white dwarf; it will glow as an emission nebula for up to 50,000 years ...
... • Eventually, the entire envelope is ejected as a planetary nebula, leaving behind its hot, degenerate core: a white dwarf • The expanding envelope is ionized by UV photons from the hot white dwarf; it will glow as an emission nebula for up to 50,000 years ...
Nearest star`s wobbles could reveal Earth`s twin
... could detect its presence within a few years, a new study argues. A telescope trained permanently on Alpha Centauri should be able to pick up the slight stellar wobbles induced by a small, rocky, Earth-like planet. Alpha Centauri lies just over 4 light years away and is the closest star system to th ...
... could detect its presence within a few years, a new study argues. A telescope trained permanently on Alpha Centauri should be able to pick up the slight stellar wobbles induced by a small, rocky, Earth-like planet. Alpha Centauri lies just over 4 light years away and is the closest star system to th ...
Astronomy 10: Introduction to General Astronomy Instructor: Tony
... Things that vary with the solar-activity cycle: sunspots, solar flares, coronal mass ejections, prominences, and the total energy output of the Sun. (11) page 242, question 10 Although the corona is very hot, it is also very faint. This makes it difficult to see against the everyday blue sky. Nevert ...
... Things that vary with the solar-activity cycle: sunspots, solar flares, coronal mass ejections, prominences, and the total energy output of the Sun. (11) page 242, question 10 Although the corona is very hot, it is also very faint. This makes it difficult to see against the everyday blue sky. Nevert ...
Spectral Classification
... G stars are probably the most well known if only for the reason that our Sun is of this class. G is host to the "Yellow Evolutionary Void". Supergiant stars often swing between O or B (blue) and K or M (red). While they do this, they do not stay for long in the G classification as this is an extreme ...
... G stars are probably the most well known if only for the reason that our Sun is of this class. G is host to the "Yellow Evolutionary Void". Supergiant stars often swing between O or B (blue) and K or M (red). While they do this, they do not stay for long in the G classification as this is an extreme ...
Exploring the Universe
... 1. H-R diagrams are used to estimate the sizes of stars and their distances, and to infer how stars change over time a. Horizontal axis=surface temperature b. Vertical axis=absolute brightness ...
... 1. H-R diagrams are used to estimate the sizes of stars and their distances, and to infer how stars change over time a. Horizontal axis=surface temperature b. Vertical axis=absolute brightness ...
here - ESA Science
... Information from Hipparcos has enabled astronomers to trace the Sun’s passage through the Galaxy back in time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended ...
... Information from Hipparcos has enabled astronomers to trace the Sun’s passage through the Galaxy back in time. This has shown that over the last 500 million years the Sun has passed through four of the Milky Way’s spiral arms. The times that these traverses occurred appear to coincide with extended ...
File
... Question 3: Are mass and energy related? Answer yes or no and then provide a brief explanation of your answer based on the analysis of the equation. Yes, mass and energy are related, the more mass you have the greater the energy and vice-versa. If you double the mass of an object it will have more e ...
... Question 3: Are mass and energy related? Answer yes or no and then provide a brief explanation of your answer based on the analysis of the equation. Yes, mass and energy are related, the more mass you have the greater the energy and vice-versa. If you double the mass of an object it will have more e ...
The Night Sky
... Billions of stars also light our night sky. Stars are huge balls of hot, glowing gas that shine throughout our universe. The Sun is not the brightest star, but it seems like it to us because it’s the closest one to Earth. All of the stars in our galaxy belong to a group called the Milky Way. It’ ...
... Billions of stars also light our night sky. Stars are huge balls of hot, glowing gas that shine throughout our universe. The Sun is not the brightest star, but it seems like it to us because it’s the closest one to Earth. All of the stars in our galaxy belong to a group called the Milky Way. It’ ...
Can you write numbers in scientific notation
... Can you define the wave properties of light (wavelength, frequency, speed of light)? Do you understand how light can be described as a particle (photon)? Can you make the following calculations if you are given the equations? - energy of an individual photon - luminosity of a star - the wavelength o ...
... Can you define the wave properties of light (wavelength, frequency, speed of light)? Do you understand how light can be described as a particle (photon)? Can you make the following calculations if you are given the equations? - energy of an individual photon - luminosity of a star - the wavelength o ...
“Crossroads of Astronomy.” Talk about Five Remarkable
... Her dissertation, entitled "Stellar Atmospheres, A Contribution to the Observational Study of High Temperature in the Reversing Layers of Stars." Showed that the great variation in stellar absorption lines was due to different amounts of atomic excitation and ionization (different temperatures), not ...
... Her dissertation, entitled "Stellar Atmospheres, A Contribution to the Observational Study of High Temperature in the Reversing Layers of Stars." Showed that the great variation in stellar absorption lines was due to different amounts of atomic excitation and ionization (different temperatures), not ...
Significance of the 27 August 2016 Venus Jupiter Conjunction A
... have appeared as a single star when they saw it before it merged. While it is clear that whatever they observed was not significant enough to motivate them to head out for Israel at the time, it clearly played a role in getting them to Jerusalem and to report what they had seen in the east (Ma 2:2), ...
... have appeared as a single star when they saw it before it merged. While it is clear that whatever they observed was not significant enough to motivate them to head out for Israel at the time, it clearly played a role in getting them to Jerusalem and to report what they had seen in the east (Ma 2:2), ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.