... Tips On Using STARLAB
by Joyce Kloncz
The first time you use STARLAB is an exciting event! If you are using it as a classroom
teacher or as a planetarium director, you’ll want to make sure you are prepared before you begin. Here are some ideas that have been used in the past for a successful
Understanding Variable Stars - Central Florida Astronomical Society
... Variable stars are those that change brightness. Their variability may be due to
geometric processes such as rotation, or eclipse by a companion star, or physical
processes such as vibration, ﬂares, or cataclysmic explosions. In each case, variable stars
provide unique information about the properti ...
... 1 Massive star formation
1.1 Massive star formation . . . . . . . . . . . . . . . . . . . . . .
1.1.1 Observational massive star-forming features . . . . . .
1.2 Ionized gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Thermal emission from ionized gas . . . . . . . . . . . .
1997 Apparition of Comet Hale-Bopp - HIGP
... Solar System, and may provide clues to the physical and chemical conditions within the nebula out of which our Solar
System formed. Comets are potentially our only direct samples of this early epoch in our history, and like the
archaeologist who uses relics to piece together the chronology and struc ...
Me and My Shadow - Making the Sun-Earth - PS
... Although horizontal sundials are more familiar to most people (due to the
fact that horizontal sundials are by far the most common type of sundial),
experience has shown that an equatorial sundial is better suited for
making the connection between the Earth's rotation and solar
time-keeping (see Are ...
Euler: Genius Blind Astronomer Mathematician
... career, Euler created analytical mechanics, the refined and highly mathematical form of
classical Newtonian mechanics2 that describes the motion of macroscopic objects,
including astronomical bodies, such as planets, stars, and galaxies. The new tools Euler
developed served to solve some of the most ...
Picturing Objects in the Making: Scheiner, Galileo and the Discovery
... presented through images. Some of them (like the pictures of the lunar surface) seem quite
realistic in traditional pictorial terms and testify to Galileo's training in the arts of d i ~ e g n o . ~
Hensedcontemporary chiaroscuro techniques for his drawings of the Moon, which were then
transferred t ...
THE DEMOGRAPHICS OF LONG-PERIOD COMETS ABSTRACT
... a conservative upper limit: most of these lost objects
were most likely either not real to begin with or fastmoving objects only visible for a short window of time.
Secondly, some comets might have been inactive at these
large heliocentric distances, and hence classiﬁed as minor
planets. The minor p ...
SOFA Astrometry Tools
... A star catalog can be constructed using any coordinate system that is fixed relative to the
cosmological background: the choices of pole and longitude zero-point are essentially arbitrary.
For some purposes galactic coordinates are convenient, while for some classical applications
ecliptic coordinat ...
... Completing the z~3 Picture
• Using molecular line emission at z=3, could probe
• “low-excitation lines will map out a larger fraction of
the ISM in these galaxies and…study in detail the
spacially resolved kinematic structure of most of the
gas…which resides in the cold phase” (Carilli & B ...
General NG Celestial Questions
... A. rapid changes in GHA and declination introduce errors into the calculations
B. lack of a well defined limb during certain phases and positions in the sky
C. approximations used in the solution caused by the variable horizontal parallax
D. augmentation effect caused by the relatively short distanc ...
A Brief Overview of the History of Western Astrology
... could be a threat to the emperor. The major astrological figure of the Roman era was Julius
Firmicus Maternus, an astrologer, lawyer and Christian. Firmicus lived in the 4th century AD
and is notable for spanning the divide between Christian and pagan thought. His
masterwork, the Mathesis, is a pra ...
Worlds Beyond The Poles
... South Pole “points” of theory.
It is now established that we may at once journey into celestial land areas by
customary movement on the horizontal from beyond the Pole points. It is also known
that the flight course from this Earth to connecting land area of the universe about us
which appears “up,” ...
Search For Gas Giants Around Late-m Dwarfs - STARS
... monitored these stars over four epochs in 2007. In addition to the measurement of relative
radial velocity we established physical properties of these stars.
The physical properties of M dwarfs we determined included the identification of neutral
atomic lines, the measurement of pseudo-equivalent wi ...
The CCD Photometric Calibration Cookbook
... photographs and latterly CCD images. The techniques for calibrating CCD images are now well
established. However, they must be applied carefully if accurate results are to be obtained.
In essence, astronomical photometry is concerned with measuring the brightness of celestial objects.
CCD (Charge-Co ...
Full text - FNWI (Science) Education Service Centre
... becoming gravitationally bound to our Oort Cloud (Sekanina, 1975).
These comets encourage the idea of a comet group populating the interstellar medium.
2.3 Interstellar comets
The group of comets that holds the main focus of this research is the group of dynamical
comets on hyperbolic orbits. These ...
Giant star seismology
... Asteroseismology – the study of global properties of stars and their internal structure
through their global intrinsic oscillations – is already more than a century old. An
early remarkable result was obtained for Cepheids revealing the period-luminosity
relation (Leavitt and Pickering, 1912), which ...
Science Case for the Chinese Participation of TMT
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark
components is the most fundamental question in (astro-)physics today. The discovery of more than
400 extrasolar planet systems indicates that our solar system may be the exception rather than the
Supernova - Wikipedia, the free encyclopedia
... Swiss astrophysicist and astronomer Fritz Zwicky, and was first used in print in 1926. Several types of
supernovae exist. Types I and II can be triggered in one of two ways, either turning off or suddenly turning on
the production of energy through nuclear fusion. After the core of an aging ...
Theoretical astronomy is the use of the analytical models of physics and chemistry to describe astronomical objects and astronomical phenomena.Ptolemy's Almagest, although a brilliant treatise on theoretical astronomy combined with a practical handbook for computation, nevertheless includes many compromises to reconcile discordant observations. Theoretical astronomy is usually assumed to have begun with Johannes Kepler (1571–1630), and Kepler's laws. It is co-equal with observation. The general history of astronomy deals with the history of the descriptive and theoretical astronomy of the Solar System, from the late sixteenth century to the end of the nineteenth century. The major categories of works on the history of modern astronomy include general histories, national and institutional histories, instrumentation, descriptive astronomy, theoretical astronomy, positional astronomy, and astrophysics. Astronomy was early to adopt computational techniques to model stellar and galactic formation and celestial mechanics. From the point of view of theoretical astronomy, not only must the mathematical expression be reasonably accurate but it should preferably exist in a form which is amenable to further mathematical analysis when used in specific problems. Most of theoretical astronomy uses Newtonian theory of gravitation, considering that the effects of general relativity are weak for most celestial objects. The obvious fact is that theoretical astronomy cannot (and does not try) to predict the position, size and temperature of every star in the heavens. Theoretical astronomy by and large has concentrated upon analyzing the apparently complex but periodic motions of celestial objects.