The weight is 56 lbs at senior level, and 35 lbs in underage level. It is mainly a men's event, though women's weight throw for distance is contested at university level.
A visible band image of Jupiter is shown below the radio image. Radio telescopes are much larger than optical telescopes because radio wavelengths are much longer than optical wavelengths. The longer wavelengths means that the radio waves have lower energy than optical light waves. In order to collect enough radio photons to detect a signal, the radio dishes must be very large.
China is building the worldâs largest radio telescope in Guizhou province, south west China. Construction for the Five hundred metre Aperture Spherical Telescope, shortened to FAST, started in March 2011. The project is now expect to be completed by September 2016. The gigantic radio telescope will cost approximately 1.2 billion Yuan (Â£120 million), making it the biggest astronomy project China has ever had.