February 2013 - astronomy for beginners
... quite close together and similar in appearance. The two brightest stars are called Pollux (β) and Castor (α) and are known as the Gemini Twins. The twins originated in a Greek myth which told that they had one mother but two fathers. Castor was the mortal son of King Tyndareus but Pollux was the imm ...
... quite close together and similar in appearance. The two brightest stars are called Pollux (β) and Castor (α) and are known as the Gemini Twins. The twins originated in a Greek myth which told that they had one mother but two fathers. Castor was the mortal son of King Tyndareus but Pollux was the imm ...
Using First-Order Logic
... Propositional logic talks about facts; predicate logic talks about relations (more expressive) A model is made of objects,relations, and functions. An interpretation maps symbols to the model Complex sentences use connectives and quantifiers Steps to develop a knowledge base. ...
... Propositional logic talks about facts; predicate logic talks about relations (more expressive) A model is made of objects,relations, and functions. An interpretation maps symbols to the model Complex sentences use connectives and quantifiers Steps to develop a knowledge base. ...
here - The Planetary Chemistry Laboratory
... TRY THESE FOR ABUNDANCES of non-volatile elements Many types of chondrites contain round silicate spheres called chondrules Chondrite groups: Ordinary chondrites: H, L, LL ...
... TRY THESE FOR ABUNDANCES of non-volatile elements Many types of chondrites contain round silicate spheres called chondrules Chondrite groups: Ordinary chondrites: H, L, LL ...
The Magnitude Scale
... The apparent and absolute magnitudes covered so far are bolometric magnitudes (bolometric comes from the word bolometer which is an instrument that measures the increase in temperature in the flux it receives at all wavelengths). In practice, detectors measure an object’s flux within a certain wav ...
... The apparent and absolute magnitudes covered so far are bolometric magnitudes (bolometric comes from the word bolometer which is an instrument that measures the increase in temperature in the flux it receives at all wavelengths). In practice, detectors measure an object’s flux within a certain wav ...
Lecture 24 Early Universe - University of Maryland
... – No remnant (neutron star or black hole) left – Since white dwarf always has same mass when it explodes, these are “standard candles” (i.e. bombs with a fixed yield, hence fixed luminosity) ...
... – No remnant (neutron star or black hole) left – Since white dwarf always has same mass when it explodes, these are “standard candles” (i.e. bombs with a fixed yield, hence fixed luminosity) ...
SNC1D0 - Pages
... a. scientists found stars where they didn’t expect them b. more matter and energy were being created every day c. scientists thought their telescope wasn’t working d. radiation came from one unexpected area of the Universe ____ 28. A light year is a. the distance light travels in a vacuum during a y ...
... a. scientists found stars where they didn’t expect them b. more matter and energy were being created every day c. scientists thought their telescope wasn’t working d. radiation came from one unexpected area of the Universe ____ 28. A light year is a. the distance light travels in a vacuum during a y ...
Written in the stars THE NOBEL PRIZE IN PHYSICS 2011
... related the geometrical shape of the Universe to its fate. Is it open or closed, or is it something in between – a flat Universe? An open Universe is one where the gravitational force of matter is not large enough to prevent the expansion of the Universe. All matter is then diluted in an ever larger ...
... related the geometrical shape of the Universe to its fate. Is it open or closed, or is it something in between – a flat Universe? An open Universe is one where the gravitational force of matter is not large enough to prevent the expansion of the Universe. All matter is then diluted in an ever larger ...
The Milky Way and Andromeda galaxies in a constrained
... Aims. We study the two main constituent galaxies of a constrained simulation of the Local Group as candidates for the Milky Way (MW) and Andromeda (M 31). We focus on the formation of the stellar discs and its relation to the formation of the group as a rich system with two massive galaxies, and inv ...
... Aims. We study the two main constituent galaxies of a constrained simulation of the Local Group as candidates for the Milky Way (MW) and Andromeda (M 31). We focus on the formation of the stellar discs and its relation to the formation of the group as a rich system with two massive galaxies, and inv ...
Document
... The Bondi accretion rate is ~ 3x1020 g s-1. If the Bondi flow terminates in a thin accretion disk, the luminosity expected is ~ 3x1040 erg s-1 (must of it in infrared and optical); this is far larger than the observed luminosity. ...
... The Bondi accretion rate is ~ 3x1020 g s-1. If the Bondi flow terminates in a thin accretion disk, the luminosity expected is ~ 3x1040 erg s-1 (must of it in infrared and optical); this is far larger than the observed luminosity. ...
PHYS3380_110215_bw - The University of Texas at Dallas
... zone that is in thermal equilibrium and undergoes little or no mixing. •In stars of less than about 10 solar masses, the outer envelope of the star contains a region where partial ionization of hydrogen and helium raises the heat capacity. The relatively low temperature in this region simultaneously ...
... zone that is in thermal equilibrium and undergoes little or no mixing. •In stars of less than about 10 solar masses, the outer envelope of the star contains a region where partial ionization of hydrogen and helium raises the heat capacity. The relatively low temperature in this region simultaneously ...
Document
... D • A is incorrect because star A has a negative apparent magnitude, which means it is a brighter star. • B is incorrect because even though star B has a big apparent magnitude, it does not have the biggest apparent magnitude of the stars listed. • C is incorrect because stars that have smaller appa ...
... D • A is incorrect because star A has a negative apparent magnitude, which means it is a brighter star. • B is incorrect because even though star B has a big apparent magnitude, it does not have the biggest apparent magnitude of the stars listed. • C is incorrect because stars that have smaller appa ...
Use of Reflected Light with Asteroid Light Curves
... inversion could be performed to create a 3D model. Curves would need to be obtained from several perspectives of the asteroid and they would need to encompass the entire period. Software was found using a method of light curve inversions to construct a 3D rendering of an asteroid. To use this softwa ...
... inversion could be performed to create a 3D model. Curves would need to be obtained from several perspectives of the asteroid and they would need to encompass the entire period. Software was found using a method of light curve inversions to construct a 3D rendering of an asteroid. To use this softwa ...
document
... Any astrometric or RV campaign to look for Earths (~1AU) will have an observing campaign lasting 5 yrs or longer. There are short (1~2) year periods during the sun spot cycle when the sun in very quiet, but a 5~15 year, astrometric or RV campaign will see the “average” sun. ...
... Any astrometric or RV campaign to look for Earths (~1AU) will have an observing campaign lasting 5 yrs or longer. There are short (1~2) year periods during the sun spot cycle when the sun in very quiet, but a 5~15 year, astrometric or RV campaign will see the “average” sun. ...
Atomic Structure Electrons in Atoms
... • Another important property of waves is their speed – dependent on type of wave and medium it’s traveling through ...
... • Another important property of waves is their speed – dependent on type of wave and medium it’s traveling through ...
solution to starry night lab
... 5. Set date = 10/1/2005, time=midnight, and timestep= 1 day. Click the "| > " button to advance a day at a time until mid-December. Does Mars change position with respect to the stars from night to night? Mars is experiencing retrograde motion, it appears to stop and turn around twice. Part V. Venus ...
... 5. Set date = 10/1/2005, time=midnight, and timestep= 1 day. Click the "| > " button to advance a day at a time until mid-December. Does Mars change position with respect to the stars from night to night? Mars is experiencing retrograde motion, it appears to stop and turn around twice. Part V. Venus ...
CHP 13
... b. neutron stars of more than 3 solar masses are not stable. c. white dwarfs must contain more than 1.4 solar masses. d. not all stars will end up as white dwarfs. e. stars with a mass less than 0.5 solar masses will not go through helium flash. 4. In A.D. 1054, Chinese astronomers observed the appe ...
... b. neutron stars of more than 3 solar masses are not stable. c. white dwarfs must contain more than 1.4 solar masses. d. not all stars will end up as white dwarfs. e. stars with a mass less than 0.5 solar masses will not go through helium flash. 4. In A.D. 1054, Chinese astronomers observed the appe ...
Larger, high-res file, best for printing
... 2015, when the New Horizons spacecraft, launched in January 2006, progress was made for nearly two more decades. The next big reaches it. The spacecraft is equipped with seven different instrubreakthrough came in 1978, when James Christy discovered that ments, including a telescopic camera that will ...
... 2015, when the New Horizons spacecraft, launched in January 2006, progress was made for nearly two more decades. The next big reaches it. The spacecraft is equipped with seven different instrubreakthrough came in 1978, when James Christy discovered that ments, including a telescopic camera that will ...
Behavior Of Waves
... Diffraction is the bending of a wave around a barrier or around the edges of an opening. Waves with a longer wavelength diffract more readily. In order to observe light diffraction the barriers or openings must be small. When light waves diffract, interference patterns can often be observed. ...
... Diffraction is the bending of a wave around a barrier or around the edges of an opening. Waves with a longer wavelength diffract more readily. In order to observe light diffraction the barriers or openings must be small. When light waves diffract, interference patterns can often be observed. ...
A-level Physics A Question paper Unit 05 - Section 2A
... 3 (b) (ii) Give reasons for your answer to part (b)(i). ...
... 3 (b) (ii) Give reasons for your answer to part (b)(i). ...
Chapter 37 - UBC Physics
... Light Section 20.5, Electromagnetic waves Light is an electromagnetic which travels at 3.00×108m/s in a vacuum. It obeys the relationship: λf = c just like other traveling waves. For visible light, 700nm(red) > λ > 400 nm(indigo) See page 631 for wavelengths of colours Index of refraction = n = ...
... Light Section 20.5, Electromagnetic waves Light is an electromagnetic which travels at 3.00×108m/s in a vacuum. It obeys the relationship: λf = c just like other traveling waves. For visible light, 700nm(red) > λ > 400 nm(indigo) See page 631 for wavelengths of colours Index of refraction = n = ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.