Administration: Individual. The DAB-4 is a revision of one of the most popular individual achievement tests available. Its 8 subtests identify studentsâ strengths and weaknesses across important areas of school achievement. A supplemental manual shows how to probe student responses to obtain information about studentsâ thinking processes and problem-solving strategies.
In 1992, the first evidence of a planetary system other than our own was discovered, orbiting the pulsar PSR B1257+12. Three years later, 51 Pegasi b, the first extrasolar planet around a Sunlike star, was discovered.
NASA Discovers 715 Planets Outside Our Solar System. Image credit: NASA. At the end of 2001: A Space Odyssey, astronaut Dave Bowmanâs final words were âMy God â itâs full of stars!â But for NASAâs Kepler mission, it might be better to change the line to âMy God â itâs full of planets!â. Since December 2009, the space observatory has discovered hundreds of worlds beyond our solar system. But in one fell swoop, the mission has enormously expanded our view of the Galaxy. NASA announced on Wednesday that the mission has discovered 715 new planets circling 305 stars.