Sentences with phrase «precise observations using»

New and very precise observations using the HARPS spectrograph at the ESO 3.6 - metre telescope at La Silla, Chile, have now not only detected the motion of the spots due to the rotation of Ceres about its axis, but also found unexpected additional variations suggesting that the material of the spots is volatile and evaporates in sunlight.

Not exact matches

Edward Oakes» observations yesterday concerning the invidious or vituperative use of the word heresy, I feel that he is turning into a matter of sentiment what should be a matter of precise definition.

The observations will be used to allow more precise reconstructions of historic climate shifts.

Firstly, for land - based volcanoes it is hard to carry out large - scale observations using artificial earthquakes because of the population density, and it is also difficult to detect giant magma buildups with precise visualization because they are often at relatively low depths (roughly 10 km).

Lambton's crew would establish a fixed reference point by laborious observations of star positions over several months, then measure a fixed distance away from the point with the fantastically precise use of metal chains and rods supported by trestles.

The scientists used the National Science Foundation's Very Long Baseline Array (VLBA), a continent - wide radio - telescope system, along with the 100 - meter radio telescope in Effelsberg, Germany, to make an extremely precise observation when the planet Jupiter passed nearly in front of a bright quasar on September 8, 2002.

Our barycentric radial velocities, derived from observations taken at the KPNO 2.1 meter telescope, differ from... ▽ More We demonstrate the ability to measure precise stellar barycentric radial velocities with the dispersed fixed - delay interferometer technique using the Exoplanet Tracker (ET), an instrument primarily designed for precision differential Doppler velocity measurements using this technique.

Using Brahe's precise observations of the planet Mars, Kepler spent the next five years developing his own method for characterizing planetary motion.

However some technical challenges still need to be taken to make the technology more accessible and usable to its full potential: gaining selective and comprehensive genetic access to the neurons of interest, controlling variation in the expression of the optogenetic tools (when using viruses) and its precise localization (axon vs. presynaptic terminals), tailoring light - delivery system signals to individual cells in a population rather than the population as a whole, developing observation techniques which have the same spatial and temporal resolution as those tools... to cite only a few of them.

But they needed additional observations, using more precise instruments, to make a definitive call.