Radar observation of near-Earth asteroids (NEAs) reveal the size, shape, spin characteristics of the population of small bodies near the Earth. Although...
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CharlaWhat do we learn from radar observations of asteroids and comets?
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CharlaWhat is the Milky Way outer halo made of? High resolution spectroscopy of distant red giants
In a framework where galaxies form hierarchically, extended stellar haloes are predicted to be an ubiquitous feature around Milky Way-like galaxies and to...
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CharlaWhat is the role of the environment in shaping early-type galaxy sizes? Did it changed in the last 10 Gyr?
Understanding galaxy evolution requires understanding the impact of cosmic time, environment, mass, and halo growth at least, because likely a combination of...
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CharlaWhat is the Sun made of?
Recent advances in 3D model atmospheres have led to a significant downward revision in photospheric heavy element abundance estimates for the Sun, especially...
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CharlaWhat makes the solar chromosphere so interesting?
Magnetic fields break through the solar surface in a hierarchy of magnetic elements ranging from Earth-sized sunspots down to tiny concentrations that are...
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CharlaWhat spectra of massive B-stars can tell us about their binary and pulsational properties
Spectroscopy is a powerful tool to unravel the nature of stellar bodies. For instance, spectra can be used to derive the temperature, gravity, and chemical...
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CharlaWhat ULIRGs and AGNs have to hide
The great energy source of ultraluminous infrared galaxies (ULIRGs) may be the accreting supermassive black holes of active galactic nuclei (AGNs) or intense...
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CharlaWhat's Wrong with Physics Today - Why the standard models are an erosion of science
The concordance model of cosmology with its constituents dark matter and dark Energy is an established description of some anomalous observations. However, a...
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CharlaWhere are the solar magnetic poles?
In mid nineteens, it was discovered that the Sun had a dipolar global magnetic field, whose temporal evolution followed the Solar Cycle. Polar regions, as well...