Small-scale solar magnetic fields

As we resolve ever smaller structures in the solar atmosphere, it has become clear that magnetism is an important component of those small structures. Small-scale magnetism holds the key to many poorly understood facets of solar magnetism on all scales, such as the existence of a local dynamo, chromospheric heating, and flux emergence, to name a few. Here, we review our knowledge of small-scale photospheric fields, with particular emphasis on quiet-sun field, and discuss the implications of several results obtained recently using new instruments, as well as future prospects in this field of research.Comment: 43 pages, 18 figure

The Comet Interceptor Mission

Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA’s F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum ΔV capability of 600 ms-1. Comet Interceptor will be unique in encountering and studying, at a nominal closest approach distance of 1000 km, a comet that represents a near-pristine sample of material from the formation of the Solar System. It will also add a capability that no previous cometary mission has had, which is to deploy two sub-probes – B1, provided by the Japanese space agency, JAXA, and B2 – that will follow different trajectories through the coma. While the main probe passes at a nominal 1000 km distance, probes B1 and B2 will follow different chords through the coma at distances of 850 km and 400 km, respectively. The result will be unique, simultaneous, spatially resolved information of the 3-dimensional properties of the target comet and its interaction with the space environment. We present the mission’s science background leading to these objectives, as well as an overview of the scientific instruments, mission design, and schedule

Poet and painter in eighth-century Greece

The relationship between poetry and the visual arts is seldom close and never simple. But special difficulties attend the study of it in the eighth century before Christ in Greece, when evidence is not only in excessively short supply but, when it does come, is almost by definition ambiguous. On the whole question of the interpretation of Late Geometric vase-painting and other eighth-century art, there are well-established opposing positions: each new discovery finds a different interpretation on the part of what may be called the optimists – those who seek for correspondences between the Homeric epics and the visual arts – and of the sceptics, who habitually argue that there is no evidence for anything of the kind. Each party appears to have found an outlet for the promulgation of its view, inasmuch as many general or semi-popular accounts of Geometric and other early Greek art present it as having a major mythological content derived from epic poetry; while many closer scholarly studies, deploying an array of iconographical learning and strict logic, nowadays reach the opposite conclusion, that there is little or no narrative content of any kind, mythological or otherwise, and no significant contact with epic, until the end of the Geometric period.</jats:p

Greek History in the Light of Archaeology

Автор приводит множество примеров, чтобы показать опасность использования археологических данных в связи с описаниями событий, даваемыми в античных источниках