Sentences with phrase «occultation in»

From studying the way the starlight dimmed, Marc Buie of Lowell Observatory in Flagstaff, Arizona, and James Elliot of the Massachusetts Institute of Technology in Cambridge, reported 14 August that Pluto's atmospheric temperature has dropped some 20 kelvin since the last occultation in 1988.

[7] The rings of Uranus, and the ring arcs around Neptune, were found in a similar way during occultations in 1977 and 1984, respectively.

Not exact matches

They believe that Allah took the 12th imam, Abu «l - Qasim Muhammad, into «occultation» — that is, Allah hid and protected him — in about 874.

The shadow passes over Patagonia at 60,000 mph, and the team already failed in their two previous attempts to see this shadow, called an occultation.

Once he'd found MU69, it was up to Buie and others to calculate its orbit and predict where its shadow would fall on Earth during the occultation last summer, resulting in those windswept telescopes on Patagonia's beaches.

A very efficient but complex method lies in the study of stellar occultations, or the passing of these objects in front of a star (like a small eclipse).

Astronomers using telescopes at seven different locations, including the 1.54 - metre Danish and TRAPPIST telescopes at ESO's La Silla Observatory in Chile [5], were able to watch the star apparently vanish for a few seconds as its light was blocked by Chariklo — an occultation [6].

A few seconds before, and again a few seconds after the main occultation there were two further very short dips in the star's apparent brightness [7].

Schlichting's group found just a single occultation, caused by a KBO approximately one kilometer in diameter, in 4.5 years of observations.

«Physically, what that means is that these objects are weak,» Bianco explains — collisions in the solar system's evolution have ground them down to even smaller bits that elude detection by the occultation surveys.

But according to Brazilian physicist Felipe Braga Ribas of the Valongo Observatory in Rio de Janeiro, observations of a stellar occultation by Quaoar on 4 May 2011 indicate a much larger diameter, between 1045 and 1095 kilometers.

These glitches are apparent from astronomical observations of occultations of stars by the moon — miniature eclipses that occur when the moon passes in front of the distant star.

The relatively brief occultation (it had been predicted to last nearly 2 minutes), combined with negative observations from a pair of telescopes in Argentina, suggested right away that Eris wasn't as large as thought.

Astronomers had known about this occultation well in advance, but the predicted path had shifted up and down along South America, leaving astronomers unsure who — if anyone — might see the event.

«This is a good place for things like an occultation, like the transit of Venus in 2004,» Consolmagno says.

A double object with a smaller moon could explain why MU69 sometimes shifts its position from where scientists expect it to be during occultations, said New Horizons team member Marc Buie of the Southwest Research Institute in Boulder, Colo..

While an occultation of the star occurs around 17h UT for observers in Japan, central Asia and the Middle East, skywatchers in the UK will have to settle for a near miss.

We use multiple observations with Warm Spitzer to detect the occultation at 7 -LCB- \ sigma -RCB- and 4 -LCB- \ sigma -RCB- in the 3.6 and 4.5 -LCB- \ mu -RCB- m bandpasses, respectively.

The Kepler occultation detection provides significant leverage, but conclusions regarding temperature structure are preliminary, given our ignorance of opacity sources at optical wavelengths in hot Jupiter atmospheres.

I continued working on occultations and occultation predictions and in 1992 I also started working on what later became the Kepler Mission.

But even if the remote satellite did not provide a 100 % occultation picking out objects otherwise lost in the glare should be possible.

«The symmetry and structure of the occultation light curve is suggestive of an atmosphere with structure, in comparison to the absence of an atmosphere surrounding Pluto,» Delaney noted.

In turn, this opens up the possibility that some of the out - of - eclipse variability could be due to occultations of the central stars by material located at the inner edge or in the central cavity of the circumbinary disIn turn, this opens up the possibility that some of the out - of - eclipse variability could be due to occultations of the central stars by material located at the inner edge or in the central cavity of the circumbinary disin the central cavity of the circumbinary disk.

«SOFIA conducted its first occultation observation, also involving Pluto, in July 2011.

«The occultation light curve shows a structured decline in intensity rather than a precipitous decline indicative of an atmosphere surrounding Pluto,» said Paul Delaney, a senior lecturer of physics and astronomy at York University in Toronto.

The presence of an atmosphere dims a star's light more gradually, as can be seen in this image of Pluto with an occultation illustrated for context.

The most recent Pluto occultation opportunity was on June 29, 2015, in the southern hemisphere, just two weeks before New Horizons makes its closest approach to the Pluto system.

With the preparation of accurate predictions successful observation of asteroid occultations has now been recorded in the UK.

Other major meetings attended by section officers were the EUROPLANET N3 Strategic Workshop «Stellar Occultation Studies» in Paris and Meeting on Asteroids and Comets in

In a stellar occultation, a body such as a planet passes in front of a relatively bright star, and measuring the gradual dimming of starlight during such an event, scientists can amass a wide array of information about a planet, including its size, whether it has rings or if an atmosphere is presenIn a stellar occultation, a body such as a planet passes in front of a relatively bright star, and measuring the gradual dimming of starlight during such an event, scientists can amass a wide array of information about a planet, including its size, whether it has rings or if an atmosphere is presenin front of a relatively bright star, and measuring the gradual dimming of starlight during such an event, scientists can amass a wide array of information about a planet, including its size, whether it has rings or if an atmosphere is present.

When astronomers graph the light data, a careful look at the gradual dimming of starlight shown in the occultation light curve reveals a «slight bend,» or «kink.»

On November 6, 2010, three teams of astronomers using three different telescopes tracking the occultation of a 17th - magnitude star in the north - central part of Constellation Cetus by Eris revealed preliminary results indicating that the dwarf planet may be smaller in diameter than Pluto after all, based on the unexpectedly short times of occultation reported.

Of course, openness is relative — there's still plenty of myth and symbolism to sift through — but the occultation is in direct dialogue with the regime set in place by Thailand's military dictatorship.

AFAIUI, the evidence we are talking about is a few occultation events over fifteen years that indicate changes in atmospheric pressure.

Turning to the outer reaches of the solar system: in the icy cold and lonely Kuiper Belt was observed a difference in Pluto's atmospheric thickness, inferred from two occultation observations 14 years apart.

Using radio occultation measurement to reconstruct the electron density profiles in the E region, Mayer & Jakowski (2009) have collected cases when the maximum density of the E region exceeds that of the F2 - layer.

To evaluate the reliability of radio occultation measurements and to study precipitation processes in more detail, coordinated EISCAT measurements would be useful.

Space - based GNSS radio occultation measurements onboard satellites such as CHAMP, GRACE, and Formosat3 / COSMIC are well suited to detect such ionization enhancements in the bottomside ionosphere.

In a novel application of space - based atmospheric measurements, Atmospheric and Environmental Research (AER), in collaboration with GeoOptics Inc., is investigating the use of radio occultation measurements to improve severe weather forecastinIn a novel application of space - based atmospheric measurements, Atmospheric and Environmental Research (AER), in collaboration with GeoOptics Inc., is investigating the use of radio occultation measurements to improve severe weather forecastinin collaboration with GeoOptics Inc., is investigating the use of radio occultation measurements to improve severe weather forecasting.

Participants discussed a scenario involving flight of solar occultation instruments (e.g., SAGE or Canadian ACE) on free flyers in inclined, precessing orbits to ensure continuity of measurements of stratospheric ozone and pertinent trace - gas profiles.