Inner Solar System Material Discovered in the Oort Cloud
... these models require significant migration of the giant planets, while others do not. These models provide different predictions on the presence of rocky material expelled from the inner Solar Syste ...
... these models require significant migration of the giant planets, while others do not. These models provide different predictions on the presence of rocky material expelled from the inner Solar Syste ...
Former PARI students shine at AAS PARI Calendar
... and 36 minutes. To orbit each other so fast, the two stars must be nearly in contact. Imagine our Sun being two stars like this orbiting each other! In 2004 a paper was published by astronomer Dr. Ron Samec suggesting that a third star is present orbiting the pair once every 101 years. But, accor ...
... and 36 minutes. To orbit each other so fast, the two stars must be nearly in contact. Imagine our Sun being two stars like this orbiting each other! In 2004 a paper was published by astronomer Dr. Ron Samec suggesting that a third star is present orbiting the pair once every 101 years. But, accor ...
Step-by-Step Instructions for Educators
... 9. Is it safe to look directly at the Sun with just your eyes during a partial solar eclipse – the time when part of the bright surface of the Sun is visible? ...
... 9. Is it safe to look directly at the Sun with just your eyes during a partial solar eclipse – the time when part of the bright surface of the Sun is visible? ...
The venerable craft of telescope mirror grinding takes on a
... a spherical surface of an appropriate radius. (In the four-meter mirror, approximately 3.5 inches had to be ground out at the center.) • Aspherifying the surface. A nonspherical mirror is required to focus light coming from a distant point source. In terms of grinding, only five thousandths of an in ...
... a spherical surface of an appropriate radius. (In the four-meter mirror, approximately 3.5 inches had to be ground out at the center.) • Aspherifying the surface. A nonspherical mirror is required to focus light coming from a distant point source. In terms of grinding, only five thousandths of an in ...
CHAPTER 8 Survey of Solar Systems
... along a line because their orbits, as well as the Earth’s, all lie in nearly the same plane, as shown in the side view of the Solar System in figure 8.5. Mercury’s orbit has the largest tilt, just 7° from the average of the rest of the planets. The Solar System out to Neptune has about the same rela ...
... along a line because their orbits, as well as the Earth’s, all lie in nearly the same plane, as shown in the side view of the Solar System in figure 8.5. Mercury’s orbit has the largest tilt, just 7° from the average of the rest of the planets. The Solar System out to Neptune has about the same rela ...
design for the TMT mid-infrared adaptive optics system
... using multiple off-axis laser guide stars to avoid a warm dichroic in the common path. Three laser guide stars, equally spaced 75” off axis, and a “conventional” 30x30 deformable mirror provide a Strehl > 0.9 at wavelengths longer than 10 microns and the LGS beams can be passed to the LGS wavefront ...
... using multiple off-axis laser guide stars to avoid a warm dichroic in the common path. Three laser guide stars, equally spaced 75” off axis, and a “conventional” 30x30 deformable mirror provide a Strehl > 0.9 at wavelengths longer than 10 microns and the LGS beams can be passed to the LGS wavefront ...
has occurred over the past 14 billion years COSMIC DOWNSIZING
... from more distant galaxies takes longer to reach us, so we observe these structures in an earlier stage of development.) By examining the x-rays emitted by the cores of these relatively close galaxies, researchers have discovered many tremendously massive black holes still devouring the surrounding ...
... from more distant galaxies takes longer to reach us, so we observe these structures in an earlier stage of development.) By examining the x-rays emitted by the cores of these relatively close galaxies, researchers have discovered many tremendously massive black holes still devouring the surrounding ...
than a one-hit wonder. Falk, Dan Astronomy
... hero. The high-school principal, Charles Dilley, arranged a scholarship for Tombaugh so he could enroll at the University of Kansas, where he would eventually earn a master's degree in 1939. And it was also in Kansas that a young woman named Patricia Edson (Patsy, to her friends) first saw a photogr ...
... hero. The high-school principal, Charles Dilley, arranged a scholarship for Tombaugh so he could enroll at the University of Kansas, where he would eventually earn a master's degree in 1939. And it was also in Kansas that a young woman named Patricia Edson (Patsy, to her friends) first saw a photogr ...
Spring 2012 - Union College
... and time. The outer part of the blue circle is marked with days of the year, while the outer part of the grey overlay is marked with times. The stars within the grey oval are the ones visible on a particular day at the time that lines up with that day. To see the sky at a different date and time, si ...
... and time. The outer part of the blue circle is marked with days of the year, while the outer part of the grey overlay is marked with times. The stars within the grey oval are the ones visible on a particular day at the time that lines up with that day. To see the sky at a different date and time, si ...
Quasars- The Brightest Black Holes
... In 1962 an opportunity arose for a much clearer determination of the position of one of these powerful but as yet unidentified sources, 3C273, when it would be eclipsed by the Moon three times - in May, August and October. The advantage of such an event is that we always know the position of the Mo ...
... In 1962 an opportunity arose for a much clearer determination of the position of one of these powerful but as yet unidentified sources, 3C273, when it would be eclipsed by the Moon three times - in May, August and October. The advantage of such an event is that we always know the position of the Mo ...
History of the Telescope
... conditions are even rarer since a star can only be seen with the highest precision when being located in the middle of the field of view. The mentioned difficulties can only be met if the telescope would move like the observed star without the interference of a human hand. This had to be with the sa ...
... conditions are even rarer since a star can only be seen with the highest precision when being located in the middle of the field of view. The mentioned difficulties can only be met if the telescope would move like the observed star without the interference of a human hand. This had to be with the sa ...
in-field pointing and stray light LISA Symp_final2.pptx
... Jeff Livas1, Shannon Sankar1, Garrett West1, Len Seals1, Joe Howard1, with help/advice from Ewan Fitzsimons2 1NASA ...
... Jeff Livas1, Shannon Sankar1, Garrett West1, Len Seals1, Joe Howard1, with help/advice from Ewan Fitzsimons2 1NASA ...
Kepler Mission: The Search for Earth-sized Planets
... Not enough gravity to hold onto a lifesustaining atmosphere (like Mercury or Mars) ...
... Not enough gravity to hold onto a lifesustaining atmosphere (like Mercury or Mars) ...
AAVSO: Epsilon Aurigae
... grounds (see Eggleton and Pringle 1985 and van Hamme and Willson 1986 for a discussion). Precision photometry of this system by Jeff Hopkins at Hopkins Phoenix Observatory also revealed the presence of low-amplitude semi-regular pulsations in the F star with a quasi-period of about 66 days. ...
... grounds (see Eggleton and Pringle 1985 and van Hamme and Willson 1986 for a discussion). Precision photometry of this system by Jeff Hopkins at Hopkins Phoenix Observatory also revealed the presence of low-amplitude semi-regular pulsations in the F star with a quasi-period of about 66 days. ...
The Astrophysical Origins of the Short
... •Requires supernova < 10 pc away, ~ 1 Myr before CAIs formed (see Fields et al. 2007) •What are the odds our Solar System “happened” be near supernova? Like case of AGB star: too low. There must be a causal connection. •One way in which SN could be causally connected is if the SN shock triggered the ...
... •Requires supernova < 10 pc away, ~ 1 Myr before CAIs formed (see Fields et al. 2007) •What are the odds our Solar System “happened” be near supernova? Like case of AGB star: too low. There must be a causal connection. •One way in which SN could be causally connected is if the SN shock triggered the ...
Galaxies - Stockton University
... feeble emitters of radio waves in general. Some galaxies are much more powerful at radio wavelengths than normal. They can exceed the Milky Way by 103 to 107 times. These are radio galaxies. When resolved many have a double-lobe appearance in which two large lobes some hundred of kiloparsecs apart e ...
... feeble emitters of radio waves in general. Some galaxies are much more powerful at radio wavelengths than normal. They can exceed the Milky Way by 103 to 107 times. These are radio galaxies. When resolved many have a double-lobe appearance in which two large lobes some hundred of kiloparsecs apart e ...
Where is the best site on Earth? Dome A, B, C and F, and Ridges A
... ・A spatially non-uniform gain of the CCD →due to the controller or the environment ? ・Comparison stars are at least 4 mag fainter →using the δ-Scuti star V1034 Cen as the comparison star for V841 Cen ・Suddenly decrease/increase the count →due to the CCD controller ? →exponentially resettled to the p ...
... ・A spatially non-uniform gain of the CCD →due to the controller or the environment ? ・Comparison stars are at least 4 mag fainter →using the δ-Scuti star V1034 Cen as the comparison star for V841 Cen ・Suddenly decrease/increase the count →due to the CCD controller ? →exponentially resettled to the p ...
J: Chapter 4: Stars and Galaxies
... its parallax—the apparent shift in the position of an object when viewed from two different positions. Extend your arm and look at your thumb first with your left eye closed and then with your right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to ...
... its parallax—the apparent shift in the position of an object when viewed from two different positions. Extend your arm and look at your thumb first with your left eye closed and then with your right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to ...
AIP Conference Paper including MPIfR 19 Channel
... strongly weather dependent, but can reach 20 mJy Hz-1/2, which is within a factor of two of the thermal background limit. For our group at MPIfR, a particularly interesting astronomical result of MAMBO has been the discovery of highly redshifted point sources in surveys of "empty" fields. These so c ...
... strongly weather dependent, but can reach 20 mJy Hz-1/2, which is within a factor of two of the thermal background limit. For our group at MPIfR, a particularly interesting astronomical result of MAMBO has been the discovery of highly redshifted point sources in surveys of "empty" fields. These so c ...
Document
... How would an alien civilization try to communicate across many light years of space? The only thing that is almost certain is that they will use photons—fastest and cheapest way to transmit information that exists (as far as we know). Even though photon signals are the only choice we can think of, ...
... How would an alien civilization try to communicate across many light years of space? The only thing that is almost certain is that they will use photons—fastest and cheapest way to transmit information that exists (as far as we know). Even though photon signals are the only choice we can think of, ...
Star Formation in Bok Globules - European Southern Observatory
... Dutch-American astronomer Bart Bok, who more than 30 years aga singled out the globules as a group of special interest among the dark clouds. Bok globules usually have angular sizes of from a few arcminutes to about 20 arcminutes, with real sizes of typically 0.15 to 0.8 parsecs. It is generally not ...
... Dutch-American astronomer Bart Bok, who more than 30 years aga singled out the globules as a group of special interest among the dark clouds. Bok globules usually have angular sizes of from a few arcminutes to about 20 arcminutes, with real sizes of typically 0.15 to 0.8 parsecs. It is generally not ...
Interstellar Space Not as Empty as you Might Think
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) ...
... Interstellar clouds are the start and end points of a star’s life. Dying stars release heavy elements back into interstellar space, which becomes richer and richer in heavy elements over time (its metallicity goes up) ...
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.