10. The Lives of the Stars
... Like photons, electrons are both particles and waves. The wavelength of an electron is ...
... Like photons, electrons are both particles and waves. The wavelength of an electron is ...
Why Star Positions?
... today prefer to work and calculate angles in units of radians. In this natural mathematical system, a full circle is divided into 2×π radians, where π or ‘pi’ = 3.14159 is that most remarkable of numbers relating the circumference of a circle to its diameter. Radians are wonderfully convenient for c ...
... today prefer to work and calculate angles in units of radians. In this natural mathematical system, a full circle is divided into 2×π radians, where π or ‘pi’ = 3.14159 is that most remarkable of numbers relating the circumference of a circle to its diameter. Radians are wonderfully convenient for c ...
Issue 118 - Apr 2014
... two, closer to the brighter star or closer to the dimmer star. Estimate the brightness to a tenth of a magnitude. You can use binoculars or naked eye. When you locate the variable field, identify the variable and comparison stars that are closest to the current magnitude of the variable. Be patient ...
... two, closer to the brighter star or closer to the dimmer star. Estimate the brightness to a tenth of a magnitude. You can use binoculars or naked eye. When you locate the variable field, identify the variable and comparison stars that are closest to the current magnitude of the variable. Be patient ...
instructions
... Your telescope is a precision optical instrument, and like any other optical instrument it should be kept away from dust and moisture which are bad for all optical systems. When lenses get dirty, blow off the dust particles before cleaning the lenses, then clean the lens gently with moistened lens t ...
... Your telescope is a precision optical instrument, and like any other optical instrument it should be kept away from dust and moisture which are bad for all optical systems. When lenses get dirty, blow off the dust particles before cleaning the lenses, then clean the lens gently with moistened lens t ...
The Milky Way
... same cloud as the star. Planet formation sites observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
... same cloud as the star. Planet formation sites observed today as dust disks of T Tauri stars. Sun and our Solar system formed ~ 4.6 billion years ago. ...
PDF
... baseline radio interferometry of far-away quasars, the International Celestial Reference Frame (ICRF) had been built with a precision of a few microarcseconds, almost three orders of magnitude better than the already available Hipparcos catalogue, but their optical counterparts were too faint to be ...
... baseline radio interferometry of far-away quasars, the International Celestial Reference Frame (ICRF) had been built with a precision of a few microarcseconds, almost three orders of magnitude better than the already available Hipparcos catalogue, but their optical counterparts were too faint to be ...
Groups of Stars
... They are spherical and have a dense concentration of stars in the center. Can contain more than a million stars. Usually do not have short-lived blue stars because these stars have already died ...
... They are spherical and have a dense concentration of stars in the center. Can contain more than a million stars. Usually do not have short-lived blue stars because these stars have already died ...
THE GALACTIC GAZETTE The Astronomical Society of Southern New England Next Meeting
... Today, the highest-mass stars top out at about 100 solar masses (Eta Carinae, one of the most massive stars in our Milky Way galaxy, is about 90). But recent cosmological simulations suggest the possibility that in the early universe truly gargantuan stars could exist. So Chen began exploring this w ...
... Today, the highest-mass stars top out at about 100 solar masses (Eta Carinae, one of the most massive stars in our Milky Way galaxy, is about 90). But recent cosmological simulations suggest the possibility that in the early universe truly gargantuan stars could exist. So Chen began exploring this w ...
Raytracing the Chandra PSF Try this at Home! D. Jerius T.J. Gaetz
... Source Multiple sources Source geometry: images, point, disk, rectangle Arbitrary spectra ...
... Source Multiple sources Source geometry: images, point, disk, rectangle Arbitrary spectra ...
Is there life in space? Activity 2: Moving Stars and Their Planets
... Q. Most of the planets that have been discovered orbit their stars at a tilt closer to 0 degrees than to 90 degrees. Why? A. The signal is more evident when the tilt is lower. The telescopes are not perfect, so they can only detect star motions that are very large. The largest motions occur when the ...
... Q. Most of the planets that have been discovered orbit their stars at a tilt closer to 0 degrees than to 90 degrees. Why? A. The signal is more evident when the tilt is lower. The telescopes are not perfect, so they can only detect star motions that are very large. The largest motions occur when the ...
Introduction - Arecibo Observatory
... possible to study very weak radio sources by increasing the effective coherence time for them from, at maximum, a few minutes to hours (Wrobel et al. VLBA Sci. Memo 24). Currently, some 50 % of VLBI observations are carried out using the phase-referencing technique. Phase-referenced observations can ...
... possible to study very weak radio sources by increasing the effective coherence time for them from, at maximum, a few minutes to hours (Wrobel et al. VLBA Sci. Memo 24). Currently, some 50 % of VLBI observations are carried out using the phase-referencing technique. Phase-referenced observations can ...
observing cards - NC Science Festival
... greenish and not quite round. Green is the color humans see best, which is lucky because it is faint. Dist: 1,400 ly ...
... greenish and not quite round. Green is the color humans see best, which is lucky because it is faint. Dist: 1,400 ly ...
The Be/X-ray transient V0332153: evidence for a tilt between the
... accretion disc, was detected (Takeshima et al. 1994). V0332153 has not been detected by the BATSE experiment since the CGRO satellite started operations in 1991 April (Bildsten et al. 1997). It is not detected with any significance by the All-Sky Monitor (ASM) on board RXTE either, according to the ...
... accretion disc, was detected (Takeshima et al. 1994). V0332153 has not been detected by the BATSE experiment since the CGRO satellite started operations in 1991 April (Bildsten et al. 1997). It is not detected with any significance by the All-Sky Monitor (ASM) on board RXTE either, according to the ...
EXPERIMENTAL TESTS OF GENERAL RELATIVITY
... If Mercury were the only planet orbiting the Sun, according to Newton’s gravity law its orbit would be a perfect ellipses. However, because of the gravitational influence of other planets, Newton’s law of gravity predicts that Mercury’s orbit should slowly preceed around the Sun. Careful observation ...
... If Mercury were the only planet orbiting the Sun, according to Newton’s gravity law its orbit would be a perfect ellipses. However, because of the gravitational influence of other planets, Newton’s law of gravity predicts that Mercury’s orbit should slowly preceed around the Sun. Careful observation ...
Star formation in galaxies over the last 10 billion
... HST: currently the most sensitive telescope in the short-wavelength infrared (nearinfrared): Can observe redshifted UV (star formation) from the most distant galaxies ...
... HST: currently the most sensitive telescope in the short-wavelength infrared (nearinfrared): Can observe redshifted UV (star formation) from the most distant galaxies ...
Operations of the Keck AO
... Go to next object Acquire star on WFS Etc.. Run Halt AO script ...
... Go to next object Acquire star on WFS Etc.. Run Halt AO script ...
A n A n c i e n... How Astronomers Know the Vast Scale of Cosmic Time
... Locally, our planet is one of nine that orbits the pleasantly energetic star we call the Sun. The solar system (Sun’s system) also includes dozens of moons and countless pieces of rocky and icy debris left over from when the system formed. Astronomers now have many samples of these other worlds to a ...
... Locally, our planet is one of nine that orbits the pleasantly energetic star we call the Sun. The solar system (Sun’s system) also includes dozens of moons and countless pieces of rocky and icy debris left over from when the system formed. Astronomers now have many samples of these other worlds to a ...
A105 Stars and Galaxies
... A planet orbits the star e Eridani at a radius of 3.2 A.U. e Eridani is similar to our Sun e Eridani is only 10.5 light years away The planet is similar to Jupiter The planet orbits e Eridani in 7 years e Eridani has at least one more planet ...
... A planet orbits the star e Eridani at a radius of 3.2 A.U. e Eridani is similar to our Sun e Eridani is only 10.5 light years away The planet is similar to Jupiter The planet orbits e Eridani in 7 years e Eridani has at least one more planet ...
Document
... • r0 gets bigger at longer wavelengths: AO is easier in the IR than with visible light ...
... • r0 gets bigger at longer wavelengths: AO is easier in the IR than with visible light ...
Understanding Uranus - Lewis Center for
... Since antiquity, some stars were seen to move through the heavens. These "planets" ("wandering stars") were Venus, Mars, Jupiter, and Saturn. Uranus is just bright enough to be seen with the naked eye, and indeed had appeared in some early star charts as an unidentified star. But it was not until 17 ...
... Since antiquity, some stars were seen to move through the heavens. These "planets" ("wandering stars") were Venus, Mars, Jupiter, and Saturn. Uranus is just bright enough to be seen with the naked eye, and indeed had appeared in some early star charts as an unidentified star. But it was not until 17 ...
5th
... 2.2 First phase of the SkyWatch 2006 contest During 1st phase, the participants proposed ideas on designing lesson plans based on the use of Astronomical archives as well as the D-Space network of robotic telescopes, which afterwards (during the 2nd phase) would be developed and implemented them in ...
... 2.2 First phase of the SkyWatch 2006 contest During 1st phase, the participants proposed ideas on designing lesson plans based on the use of Astronomical archives as well as the D-Space network of robotic telescopes, which afterwards (during the 2nd phase) would be developed and implemented them in ...
ASTR-264-Lecture
... moons. Solar systems, planets, moons, and asteroids and comets are all in it Nebula-an interstellar cloud of gas and/or dust Galaxy- a great island of stars in space, held together by gravity and orbiting a common center Universe-the sum total of all matter and energy; that is, everything within it ...
... moons. Solar systems, planets, moons, and asteroids and comets are all in it Nebula-an interstellar cloud of gas and/or dust Galaxy- a great island of stars in space, held together by gravity and orbiting a common center Universe-the sum total of all matter and energy; that is, everything within it ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.