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Major episodes of geologic history of Isidis Planitia on Mars
We have mapped the area of Isidis Planitia (1-27^oN, 75-103^oE) in order to assess the geologic history of this region using modern data sets such as MOLA topography and the high-resolution images provided by the HRSC, CTX, and HiRISE cameras. Results of our mapping show that the geologic history of...
Uninhabited habitats on Mars
Investigations of Mars as a potential location for life often make the assumption that where there are habitats, they will contain organisms. However, the observation of the ubiquitous distribution of life in habitable environments on the Earth does not imply the presence of life in martian habitats....
Opposition effect of Trojan asteroids
We obtained well-sampled magnitude-phase curves for (588) Achilles, (884) Priamus, and (1143) Odysseus in the maximal attainable phase angle range down to 0.1-0.2^o. The magnitude-phase relations have a linear behavior in all observed range of phase angles and do not show any non-linear opposition b...
Using sparse photometric data sets for asteroid lightcurve studies
We consider the potential limitations of sparse data sets using different sampling rates with respect to specific research questions that might be addressed with lightcurve data. For our study we created synthetic sparse data sets similar to those from wide-field surveys by generating more than 380,...
A high-amplitude thermal inertia anomaly of probable magnetospheric origin on Saturn's moon Mimas
Spectral maps of Mimas' daytime thermal emission show a previously unobserved thermal anomaly on Mimas' surface. A sharp V-shaped boundary, centered at 0^oN and 180^oW, separates relatively warm daytime temperatures from a cooler anomalous region occupying low- to mid-latitudes on the leading hemisph...
Families among high-inclination asteroids
We present a new classification of families identified among the population Of high-inclination asteroids. We computed synthetic proper elements for a Sample of 18,560 numbered and multi-opposition objects having sine of proper Inclination greater than 0.295. We considered three zones at different H...
The structure of Titan's atmosphere from Cassini radio occultations
We present results from the two radio occultations of the Cassini spacecraft by Titan in 2006, which probed mid-southern latitudes. Three of the ingress and egress soundings occurred within a narrow latitude range, 31-34^oS near the surface, and the fourth at 52.8^oS. Temperature-altitude profiles fo...
Impact of two DNA repair pathways, homologous recombination and non-homologous end joining, on bacterial spore inactivation under simulated ...
Spores of Bacillus subtilis were used as a model system to study the impact of the two major DNA double-strand break (DSB) repair mechanisms [homologous recombination (HR) and non-homologous end-joining (NHEJ)] on the survivability of air-dried mono- and multilayers of bacterial spores under a simula...
Neptune's rotational period suggested by the extraordinary stability of two features
I suggest that Neptune's interior can be indirectly probed at visible wavelength by tracking 10 features that are connected with a stationary latitudinal speed pattern of 7m/s amplitude. All 10 features remained aligned at the same longitude throughout the Voyager observation period in 1989. Two of...
In situ measurements of particle load and transport in dust devils
We find that deflation rates caused by dust devil erosion are ~2.5-50@mm per year in dust devil active zones on Earth. Similar values are expected for Mars, and may be more significant there where competing erosional mechanisms are less likely....