Studies of the Solar System's dynamics generally treat it in isolation and do not consider the influence a passing star could have on the orbits of the planets over time. According to a recent study by a team of astronomers, stars passing close to the Solar System could result in the loss of planets over the next 5 billion years.
Ultraviolet astronomical observations have always been hindered by one simple fact - the Earth's atmosphere blocks most UV photons, especially in the UV-C and UV-B range of 100-315nm wavelengths. So, astronomers must have a collector above the atmosphere if they want to know what is happening in those wavelengths. A consortium from Institut d'Estudis Espacials de Catalunya (IEEC) hopes to provide additional insight into that realm with their PhotSat mission, a CubeSat that will observe the whole sky in UV and visible light once every few days.