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Hubble`s Expansion of the Universe
Hubble`s Expansion of the Universe

... a distance indicator as they become too faint. At this point, we use another object known as type Ia supernovae. A supernova marks the end of a star’s life in an extremely energetic explosion. When a supernova explodes, its light intensity brightens to a peak, and then gradually fades over time. For ...
Bringing E.T. into Your Classroom The Search for
Bringing E.T. into Your Classroom The Search for

... (spectroscopy and detection by radial velocity/Doppler shift) SC4 – Student will use the organization of the Periodic Table to predict properties of elements. b) Compare and contrast trends in the chemical and physical properties of elements and their placement on the Periodic Table. (concepts of Ha ...
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... redder, and more luminous after its time on the main sequence is over. ...
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MAIN SEQUENCE STARS, Red Giants and White Dwarfs
MAIN SEQUENCE STARS, Red Giants and White Dwarfs

... • 16O + 4He  20Ne +  • 20Ne + 4He  24Mg +  • We’ll come back to this type of onion-layer model star when we talk about supernova explosions and neutron stars. • The elements cooked here are needed for life ...
Astronomical Coordinates, Distances and Magnitudes
Astronomical Coordinates, Distances and Magnitudes

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Notes on White Dwarfs and Neutron Stars.

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Astronomy Triemester Review Sheet 2015
Astronomy Triemester Review Sheet 2015

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... • The Sun is located at the inner edge of a spiral arm about 2/3 of the way out from the center to the edge • The main components of the Galaxy are the disk, the bulge, and the halo • We can measure the mass of the Galaxy from the orbits of stars ...
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... through radiation and convection. The Sun has radiative transport in its core and an outer convection zone that starts at around 0.7R . This outer convection zone becomes deeper for lighter stars, and stars that are lighter than 0.3M are fully convective. On the other hand the hydrogen burning bec ...
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GoSkyWatch User`s Guide

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... et al. (2010). However is likely that potentially habitable planets around other stars have an atmosphere with high concentrations of carbon dioxide (CO2 ) similar to early Earth’s atmosphere. The goal of this research is to analyze the response of atmospheric chemistry of potentially habitable plan ...
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slides - Walter Burke Institute for Theoretical Physics

... Lars Bildsten Kavli Institute for Theoretical ...
Where do elements come from?
Where do elements come from?

... from the elements created in massive stars. Stars are huge factories producing the elements found in the Universe. ...
Where planets are formed: Protoplanetary disk evolution and planet
Where planets are formed: Protoplanetary disk evolution and planet

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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 ...
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2. The Anatomy of Stellar Life and Death
2. The Anatomy of Stellar Life and Death

... with a very similar scaling of the mass of protostars. The observations were done in the millimeter (microwave) range where the dusty material comprising the nebula is transparent. This allowed detailed observations of the internal structure of the nebula. Beuther’s and Schilke’s work revealed a neb ...
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... – Opaque to blue light, UV, X-rays – Transparent to red light, IR, radio ...
Astrophysics - Cathkin High School
Astrophysics - Cathkin High School

... flattening at the poles has been caused by the centrifuge effect on the liquid Earth as it cools. The Earth is 4600 million years old and is still cooling down. The poles, nearer the centre of the Earth than the equator, experience a greater pull. In Scotland “g” lies between these two extremes at a ...
•TODAY •Chapter 5/10: The Sun Required: Sec. 1
•TODAY •Chapter 5/10: The Sun Required: Sec. 1

... The Sun is 150 million km (93,000,000 miles) away=1AU ! Distance found during the Transit of Venus, 1761 The Sun 109 times larger than Earth ! ...from its angular size It is 333,000 times more massive than Earth ! Newton’s Law of Gravity lets us measure mass Its surface temperature is 5,800 Kelvin ! ...
Chapter 1 Our Place in the Universe
Chapter 1 Our Place in the Universe

... • With Earth’s axis tilted by 23.5º (pointing to close to Polaris) It rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. The Earth orbital path defines a flat plane called the Ecliptic. The ecliptic is also the apparent path of the Sun in the celestial sph ...
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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.
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