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.
1 HD 69830: Has a planetary system with three Neptune-mass planets. 2  It is the first triple planetary system without any Jupiter-like planets discovered around a Sun-like star. 3  All three planets were announced on May 18 by Lovis. These discoveries indicated that low-mass planets that orbit around nearby stars are very common. 61 Virginis is the first star like the Sun to host the super-Earth planets. 2  GJ 1214 b: On December 16, a super-Earth planet was discovered by transit.