Planetarium Key Points
... Geographic Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ...
... Geographic Latitude is the elevation of the visible pole and, roughly, of Polaris The motion of the sphere seems uniform, for this reason it was the source for time telling, but the time scale that comes from is NOT uniform: rotation is slowing down, the day is longer and longer at the rate of 2 ...
The HR Diagram (PowerPoint version)
... Note that there are stars of all spectral types, from OB (hot) to M (cool) There are only a few quite bright stars (near the top) but lots of faint ones. (The bottom, magnitude 6, is the limit of the human eye.) There is no particular pattern: there are bright and faint hot stars, and bright and fai ...
... Note that there are stars of all spectral types, from OB (hot) to M (cool) There are only a few quite bright stars (near the top) but lots of faint ones. (The bottom, magnitude 6, is the limit of the human eye.) There is no particular pattern: there are bright and faint hot stars, and bright and fai ...
Nebulas - WLWV Staff Blogs
... together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
... together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
Stellar Temperature and Luminosity Stellar Temperatures and
... To understand thermal spectra To understand Wien’s Law and the Stephan-Boltzmann Law To understand how thermal spectra can be used to evaluate the temperature of a star To understand how temperature and radius of a star determine a star’s luminosity Introduction: In this activity we will lea ...
... To understand thermal spectra To understand Wien’s Law and the Stephan-Boltzmann Law To understand how thermal spectra can be used to evaluate the temperature of a star To understand how temperature and radius of a star determine a star’s luminosity Introduction: In this activity we will lea ...
Figure 1
... Figure 5: Color-magnitude diagrams for the galaxy NGC6503 (Figure 1), shown in multiple band combinations for the horizontal axis. Point-sources are detected down to S/N=3 ...
... Figure 5: Color-magnitude diagrams for the galaxy NGC6503 (Figure 1), shown in multiple band combinations for the horizontal axis. Point-sources are detected down to S/N=3 ...
universe.pps - Prophet Muhammad For All
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
here
... 17. In what direction is the star producing the red spectrum moving? a. Toward us b. Away from us c. Cannot be figured out from this plot 18. How fast is the star producing the red spectrum moving? a. 300,000 km/sec b. 150 km/sec c. 15000 km/sec d. 0.205 km/sec e. 61,500 km/sec 19. This figure is si ...
... 17. In what direction is the star producing the red spectrum moving? a. Toward us b. Away from us c. Cannot be figured out from this plot 18. How fast is the star producing the red spectrum moving? a. 300,000 km/sec b. 150 km/sec c. 15000 km/sec d. 0.205 km/sec e. 61,500 km/sec 19. This figure is si ...
Unit 1
... • You may be asking, “If light cannot escape a black hole, how can we see one?” • If a black hole is in orbit around a companion star, the black hole can pull material away from it. ...
... • You may be asking, “If light cannot escape a black hole, how can we see one?” • If a black hole is in orbit around a companion star, the black hole can pull material away from it. ...
Astronomy Glossary Key
... object is, the greater the force of gravity, the closer the object is the greater the force. In 1925 Hubble was first to notice that the light from hydrogen starlight was shifted towards the red end of the spectrum. This proves all stars are moving away from each other so the universe must be expand ...
... object is, the greater the force of gravity, the closer the object is the greater the force. In 1925 Hubble was first to notice that the light from hydrogen starlight was shifted towards the red end of the spectrum. This proves all stars are moving away from each other so the universe must be expand ...
Virtual Sky II (Rev 10/11)
... Give the two dates when the Sun is at the position where the path crosses itself. ___________ _________________ ...
... Give the two dates when the Sun is at the position where the path crosses itself. ___________ _________________ ...
2.64 3.26156 8.61 pc ly × =
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
... Thus Polaris is about 49.6 times farther from us than Sirius. From Appendix 5 of the textbook, Sirius is 8.58 ly from Earth so Polaris is 8.58 ly X 49.6 = 425 ly away. 13.49. Proxima Centauri, the star nearest the Earth other than the Sun, has a parallax of 0.772 arcseconds. How long does it take li ...
Candles in the Dark
... ades. Not all stars are as constant as this, and astronomers know of thousands of variable stars ...
... ades. Not all stars are as constant as this, and astronomers know of thousands of variable stars ...
TY Course Day 2 Friday Constellations v1
... evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
... evidence of atmospheric water vapor beyond the solar system, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.