Estimating False Positive Contamination in Crater Annotations from Citizen Science Data [0.03%]
基于公民科学数据估算撞击坑注解的假阳性污染量
P D Tar,R Bugiolacchi,N A Thacker et al.
P D Tar et al.
Web-based citizen science often involves the classification of image features by large numbers of minimally trained volunteers, such as the identification of lunar impact craters under the Moon Zoo project. Whilst such approaches facilitate...
A J Lovell,F P Schloerb,E A Bergin et al.
A J Lovell et al.
Maps of comet C/1995 O1 (Hale-Bopp) in the millimeter-wave emission of the ion HCO+ revealed a local minimum near the nucleus position, with a maximum about 100,000 km in the antisolar direction. These observed features of the HCO+ emission...
F P Schloerb,C H Devries,A J Lovell et al.
F P Schloerb et al.
Observations of comets in the 18-cm OH transitions offer a means to probe gas production, kinematics, and OH excitation in comets. We present initial results of OH observations of comet Hale-Bopp obtained with the NRAO 43 m antenna located ...
W M Irvine,J E Dickens,A J Lovell et al.
W M Irvine et al.
The abundance ratio of the isomers HCN and HNC has been investigated in comet Hale-Bopp (C/1995 O1) through observations of the J = 4-3 rotational transitions of both species for heliocentric distances 0.93 < r < 3 AU, both pre- and post-pe...
G Arrhenius
G Arrhenius
Space exploration has changed our views not only on the properties of celestial bodies and the interplanetary medium but also our perspective on the formation of such bodies, including the Earth. However, on few points do the new hetegonic ...
The delivery of organic matter from asteroids and comets to the early surface of Mars [0.03%]
小行星和彗星向火星早期表面输送有机质
G J Flynn
G J Flynn
Carbon delivered to the Earth by interplanetary dust particles may have been an important source of pre-biotic organic matter (Anders, 1989). Interplanetary dust is shown to deliver an order-of-magnitude higher surface concentration of carb...
T Owen,A Bar-Nun
T Owen
The relatively low value of Xe/Kr in the atmospheres of Earth and Mars seems to rule out meteorites as the major carriers of noble gases to the inner planets. Laboratory experiments on the trapping of gases in ice forming at low temperature...
K O Pope,A C Ocampo,C E Duller
K O Pope
The Chicxulub impact crater in northwestern Yucatan, Mexico is the primary candidate for the proposed impact that caused mass extinctions at the end of the Cretaceous Period. The crater is buried by up to a kilometer of Tertiary sediment an...
The distribution of solar flares and probable relations to biological effects [0.03%]
太阳闪焰的分布及其可能与生物效应之间的关系
B Petropoulos,C Poulakos
B Petropoulos
We have compared the monthly distribution of the total number of flares to the monthly mortality from cardiovascular and myocardial infarctions for the time period 1974-1983, and computed correlation coefficients. Periodicities of 3 and 5 m...
Video observations, atmospheric path, orbit and fragmentation record of the fall of the Peekskill meteorite [0.03%]
佩克斯基尔陨石坠落的视频观测、大气路径、轨道和分裂记录
Z Ceplecha,P Brown,R L Hawkes et al.
Z Ceplecha et al.
Large Near-Earth-Asteroids have played a role in modifying the character of the surface geology of the Earth over long time scales through impacts. Recent modeling of the disruption of large meteoroids during atmospheric flight has emphasiz...