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And a new era in astronomy and quantum physics of the universe. Energy and quality changes in gravitational waves from cosmic objects, gravitational waves of different frequencies correspond to different astrophysical processes. Gravity spectra indicate that ground-based observations of high-frequency (> 10Hz) corresponds to the gravitational wave is mainly dense binary gravitational radiation. The 1960s, people began to detect gravitational waves in the ground with a resonant antenna, but due to insufficient sensitivity without obtaining a positive result. Since the 1990s, people began to use laser interferometry method to measure gravitational waves in the ground, arm length respectively 4 km (US LIGO), 3 km (Italian, French cooperation VIRGO), 600 meters (Germany, Britain co-GEO), and 300 meters (Japan TAMA300), its technical level than the resonant antenna method of improving the detection sensitivity of four orders of magnitude, so that the final experimental group LIGO can observe directly to the signal of gravitational waves. In recent astronomical observations, X-rays and other dense star clusters provide evidence of dynamics in the intermediate-mass black hole environment, and in the process of galaxies and cosmology level of growth, the existence of intermediate-mass black holes as seed sources early supermassive black holes, but also in theory it has been widely accepted. Based on the experimental gravitational wave detection device ground, due to the impact of space limitations and the distance of the Earth's gravity gradient noise, unable to detect gravitational waves is lower than 10Hz, making research goals become more limited. For this reason, scientists of many countries are stepping up to carry out space gravitational wave detection research program. In 1993, the European Space Agency (ESA) first proposed Laser Interferometer Space Antenna (LISA) program in 10-4-10-2Hz band measurements of gravitational waves in space. LISA gravitational wave source program is binary systems, dual supermassive black holes and massive black holes than double the merging of ordinary black holes massive galactic nuclei capture stellar mass black holes, ultra-compact binaries, and the explosion of massive object like. By the end of 2015 has been launched key technology demonstrator satellite LISA LISA-Pathfinder, scheduled for launch around 2025 (which may be extended to 2030 or later) by the three respective five million kilometers apart, the space is equipped with a laser interferometer space satellite groups cited Jiaoquhanjiu squeeze â…°â’… Zhanjiaoxiedai! [Naphthalene private Guo îƒ\xB0 saved miscellaneous ham train affected:? T806 / 5, K9068 / 7 between Zhaoqing Zhaoqing to Zhangjiajie to Kowloon between Zhaoqing