We report on the cometary activity of the minor body P/2010 C1 (Scotti), an active Centaur observed at 5.51 AU. The long-term dynamical behavior of this target is characterized by a close encounter with Saturn, which in 1877 drastically decreased its perihelion distance and semi-major axis to present values. It is probably a "transition" active

The dynamics of the solar radiative interior are still poorly constrained by comparison to the convective zone. This disparity is even more marked when we attempt to derive meaningful temporal variations. Many data sets contain a small number of modes that are sensitive to the inner layers of the Sun, but we found that the estimates of their

To be able to detect a biosphere in an extrasolar planet, life in that planet should have been able to alter the original composition of the planetary atmosphere. In this way, an external observer could detect the chemical disequilibrium introduced by living organisms in the planet. The earthshine technique has allowed us to determine the best disk

The transient LMXB and 11 Hz pulsar currently in outburst in Terzan 5 (ATEL #2919, #2920, #2922, #2924, #2932) has been recently observed to show at least one eclipse of 511 s duration (ATEL #2929). We have checked the Chandra lightcurves (readout streak and dust-scattered halo) from the 2000 July 24 observation (Heinke et al. 2003, ApJ, 590, 809)

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