Right Ascension and Declination
... Right Ascension and Declination Declination and right ascension are coordinates resembling latitude and longitude, but instead of giving the position of location on Earth, they give a position of an object, like a star, on the sphere of the sky. Together, they make up the equatorial coordinate syste ...
... Right Ascension and Declination Declination and right ascension are coordinates resembling latitude and longitude, but instead of giving the position of location on Earth, they give a position of an object, like a star, on the sphere of the sky. Together, they make up the equatorial coordinate syste ...
A near IR adaptive optics search for faint companions to early
... We suspect that it is a highly reddened (J − K = 2.4) background star. In this region of sky there are other multiple systems with similar proper motions and radial velocities (e.g. HR 3283, 3322, 3359). Therefore, NO Pup belongs to an association. HD 108248/49/50 = α1,2 Cru. The coronographic image ...
... We suspect that it is a highly reddened (J − K = 2.4) background star. In this region of sky there are other multiple systems with similar proper motions and radial velocities (e.g. HR 3283, 3322, 3359). Therefore, NO Pup belongs to an association. HD 108248/49/50 = α1,2 Cru. The coronographic image ...
Chandra Emission Line Diagnostics of Sco
... With the proliferation of x-ray technology over the last several decades, it has been discovered that hot stars are strong x-ray sources. New models are being created to explain these data. Our sun produces x-rays through a magnetic dynamo created by the interaction of convection and rotation. It wa ...
... With the proliferation of x-ray technology over the last several decades, it has been discovered that hot stars are strong x-ray sources. New models are being created to explain these data. Our sun produces x-rays through a magnetic dynamo created by the interaction of convection and rotation. It wa ...
Description of Pictures In the Dome
... The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star for ...
... The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star for ...
Stellar Pops 2
... • CMD studies: Derive age/metallicity mix of a population – to HB (current limit, M31 group) – to 12Gyr main-sequence turnoff (current limit, Milky Way Galaxy companions) ...
... • CMD studies: Derive age/metallicity mix of a population – to HB (current limit, M31 group) – to 12Gyr main-sequence turnoff (current limit, Milky Way Galaxy companions) ...
Asteroseismology of Solar-Like Stars
... With these scaling relations and an independent source of Tef f , the project can progress, and power spectra, along with stellar parameters can be determined. ...
... With these scaling relations and an independent source of Tef f , the project can progress, and power spectra, along with stellar parameters can be determined. ...
Lec09_ch11_lifecycleofstars
... unstable and variable – but often in predictable ways--Cepheid variables ...
... unstable and variable – but often in predictable ways--Cepheid variables ...
December, 2012 Vol.23 No.12 The Newsletter of the Cape Cod Astronomical Society
... We are sorry to inform you that former President of CCAS and Astronomy Teacher Extraordinaire Jon Greenberg passed away Thursday, November 15th. Our condolences to his wife, family, and friends. We understand Jon had been hospitalized for pneumonia. We hope to have more information on Jon and his co ...
... We are sorry to inform you that former President of CCAS and Astronomy Teacher Extraordinaire Jon Greenberg passed away Thursday, November 15th. Our condolences to his wife, family, and friends. We understand Jon had been hospitalized for pneumonia. We hope to have more information on Jon and his co ...
Astrophotography Manual
... Look through the camera view lens for a bright star and estimating the field in the view, place the star in the position in the view such that the target object will most likely be in the view too. Remember to focus to infinity and set to the largest aperature. If your area is affected by sky fog, u ...
... Look through the camera view lens for a bright star and estimating the field in the view, place the star in the position in the view such that the target object will most likely be in the view too. Remember to focus to infinity and set to the largest aperature. If your area is affected by sky fog, u ...
The Case against Copernicus
... the great bulk of two millennia’s worth of data came from Brahe. This supremely accomplished astronomer had been impressed by the elegance of the Copernican system. Yet he was bothered by certain aspects of it. One thing that unsettled him was the lack of a physical explanation for what could make E ...
... the great bulk of two millennia’s worth of data came from Brahe. This supremely accomplished astronomer had been impressed by the elegance of the Copernican system. Yet he was bothered by certain aspects of it. One thing that unsettled him was the lack of a physical explanation for what could make E ...
The Milky Way Galaxy
... The center of the Milky Way is surrounded by a spherical halo of about 150 globular clusters. A globular cluster is a densely packed ball of stars containing hundreds of thousands or even millions of stars. The stars of globular clusters are low in metals and were thus formed when the Galaxy was you ...
... The center of the Milky Way is surrounded by a spherical halo of about 150 globular clusters. A globular cluster is a densely packed ball of stars containing hundreds of thousands or even millions of stars. The stars of globular clusters are low in metals and were thus formed when the Galaxy was you ...
VV Cephei Eclipse Campaign 2017/19
... The binary star system VV Cephei is a cool red supergiant star (M2 Iab) with a smaller hot blue companion star (B02V). The primary star of VV Cephei is a massive red supergiant star, with an estimated mass of about 20 solar masses. The two stars in this binary are well-separated and significant mass ...
... The binary star system VV Cephei is a cool red supergiant star (M2 Iab) with a smaller hot blue companion star (B02V). The primary star of VV Cephei is a massive red supergiant star, with an estimated mass of about 20 solar masses. The two stars in this binary are well-separated and significant mass ...
Lectures 14 & 15 powerpoint (neutron stars & black holes)
... Small Doppler shifts were observed in the spectra of PSR1257+12 Analysis revealed that this pulsar was orbited by at least two planets with masses roughly 4.3 and 3.9 Earth masses! Further analysis revealed a third planet with a mass of about that of our moon! And there is evidence that a fourth pla ...
... Small Doppler shifts were observed in the spectra of PSR1257+12 Analysis revealed that this pulsar was orbited by at least two planets with masses roughly 4.3 and 3.9 Earth masses! Further analysis revealed a third planet with a mass of about that of our moon! And there is evidence that a fourth pla ...
ASTR 1020 Homework Solutions Chapter 1
... years and a is in AU. (a) P = 64 years, so P2 = 4096. Then a = cube root of 4096 = 16 AU. (b) The distance between perihelion and aphelion equals the major-axis, i.e., two times the semi-major axis or 2a. So, if the comet is 31.5 AU from the Sun at aphelion, then it must be (2 × 16 AU) – 31.5 AU = 0 ...
... years and a is in AU. (a) P = 64 years, so P2 = 4096. Then a = cube root of 4096 = 16 AU. (b) The distance between perihelion and aphelion equals the major-axis, i.e., two times the semi-major axis or 2a. So, if the comet is 31.5 AU from the Sun at aphelion, then it must be (2 × 16 AU) – 31.5 AU = 0 ...
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.