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April 2015 - Southern Astronomical Society
April 2015 - Southern Astronomical Society

GoSkyWatch User`s Guide
GoSkyWatch User`s Guide

... Rotate the device like a steering wheel to pan left or right. Rotating the device clockwise pans the viewing direction to the right. Rotating anti-clockwise pans the viewing direction to the left. For locations in the northern hemisphere you will be looking east once you have rotated the device 90 ...
Measuring the Stars Section 29.2
Measuring the Stars Section 29.2

... observed from Earth. This apparent shift in position caused by the motion of the observer is called parallax. ...
star pattern identification : application to the precise attitude
star pattern identification : application to the precise attitude

... The Auroral Spacecraft is one of the four satellites launched for the Interball project by the Russian Space Agency in cooperation with the international scientific community which are dedicated to magnetospheric research. This spacecraft is subject to the effects of energy exchange between the flex ...
Exercises
Exercises

... i-iii. Answer question (a) iii, iv and v for the thermal timescale and calculate the age of the Sun according to Kelvin. iv. Why are most stars observed to be main-sequence stars and why is the Hertzsprung-gap called a gap? (c) The dynamical timescale τdyn . i-iii. Answer question (a) iii, iv and v ...
CCD PHOTOMETRY OF OPEN STAR CLUSTER M67
CCD PHOTOMETRY OF OPEN STAR CLUSTER M67

interactive.hr.diagram
interactive.hr.diagram

... You need a 100 percent on the quiz to receive a stamp. The stamp is worth 12 points! The stamp is worth ...
Pattern recognition of star constellations for spacecraft
Pattern recognition of star constellations for spacecraft

... The star catalogue includes the declination, right ascension, and magnitude of the stars as detected by the CCD-camera. It includes the 1539 brightest stars, and it is based on the PPM catalogue [4]. It is compiled with the following corrections of the raw star data: ...
Doppler Effect
Doppler Effect

- EPJ Web of Conferences
- EPJ Web of Conferences

... variations at a significant level is now typically treated as the definitive evidence that a TEP is not a blend. In this contribution we describe the methods used by the HATNet team to rule out subtle blend configurations like OGLE-TR-33. We first describe our blendanal program which we use to rejec ...
Plotting Supernova Light Curves
Plotting Supernova Light Curves

Studying Variable stars using Small Telescopes Observational
Studying Variable stars using Small Telescopes Observational

... their brightness as a function of time. Brightness variation: 0.001– 20 mag. (in V band ∆λ=850 Å) ...
Galaxy Formation and Evolution
Galaxy Formation and Evolution

... Cosmological Principle, the hypothesis that the Universe is spatially homogeneous and isotropic, and Einstein’s theory of General Relativity, according to which the structure of space-time is determined by the mass distribution in the Universe. In currently popular cosmologies we usually consider a ...
Syllabus
Syllabus

... score. Students who decide to pursue the paper-extra-work/credit must turn in a paper in an Astronomy or Astronomyrelated topic. The due dates, format of, and evaluation of the paper are described below. Note #5: The attached lecture schedule includes the tentative test dates, as the semester develo ...
Stellar Evolution
Stellar Evolution

... Wolf-Rayet stars are among the most massive (typically over 20 solar masses), hottest (surface temperatures over 25,000 K), and shortest lived stars known. Wolf-Rayet stars represent an evolutionary phase in the lives of massive stars during which they undergo heavy mass loss. They are characterized ...
discover the wonders above
discover the wonders above

... COLDEST PLANET At -224°C Uranus is the coldest planet in our Solar System. Although Neptune is further away from the Sun it generates 2.61 times more energy than it receives, keeping it slightly warmer. ...
Notes 6 - University of Northern Iowa
Notes 6 - University of Northern Iowa

... are particles that easily absorb energy, particularly large gas molecules and dust. Such large molecules can exist in the outer layers of these cool stars, and have been observed. The winds in these stars are actually best described as superwinds. These are the types of winds we see when we see larg ...
A New Variable Star in Perseus
A New Variable Star in Perseus

... robotic telescope operated without filters. A code of Schwarzenberg-Czerny (1989, 1996) was used in order to find the period of variable star. The period of variable star was determined as P=0d.55120.0005 using the first observational point as an initial epoch. Multi-colour observations of GSC 3692 ...
Binaries
Binaries

... Gravitational Force = Centripetal Force  Me = v2Rm/G Similarly we can calculate the Sun’s mass using Earth’s orbit.  We need at least two object rotating around each other to calculate the mass of them. ...
–1– 2. Milky Way We know a great deal, perhaps more than any
–1– 2. Milky Way We know a great deal, perhaps more than any

... Kapteyn was aware of extinction problems. He searched for these, but did not find any significant effect. However, the mistake he made was at that time he was only aware of scattering by dust particles, but he did not consider absorption, which turns out to have a much more important effect. • Shapl ...
Photoelectric Photometry of the Pleiades
Photoelectric Photometry of the Pleiades

... The computer program you will use is a realistic simulation of a UBV photometer attached to a moderate sized research telescope. The telescope is controlled by a computer that allows you to move from star to star and make measurements. Different filters can be selected for each observation, and the ...
S1_LectureOutlines
S1_LectureOutlines

Gilmore
Gilmore

... Note different scales: information at small and large r poor. ...
Solutions Assignment #3
Solutions Assignment #3

Oldest SN
Oldest SN

< 1 ... 76 77 78 79 80 81 82 83 84 ... 317 >

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.
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