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Solar flares are the largest energy-release events in the Solar System, allowing us to study fundamental physical phenomena under extreme conditions. Those include magnetic reconnection, particle acceleration, radiation transport, and…

The aim of this paper is to encourage science educators and outreach groups to look appropriately at the Sun and consider it as an extraordinary pedagogical tool to teach science at all education stages, what we call here as the solar…

Clouds affected by solar eclipses could influence the reflection of sunlight back into space and might change local precipitation patterns. Satellite cloud retrievals have so far not taken into account the lunar shadow, hindering a reliable…

Atmospheric and Oceanic Physics · Physics 2024-02-14 Victor J. H. Trees , Stephan R. de Roode , Job I. Wiltink , Jan Fokke Meirink , Ping Wang , Piet Stammes , A. Pier Siebesma

In this study we searched for shadow bands associated with the total solar eclipse of April 8, 2024. Our aim was to improve our understanding of their origin. Shadow bands are debated to arise either from atmospheric turbulence within…

A review of solar cycle prediction methods and their performance is given, including forecasts for cycle 24 and focusing on aspects of the solar cycle prediction problem that have a bearing on dynamo theory. The scope of the review is…

Solar and Stellar Astrophysics · Physics 2015-05-20 K. Petrovay

We report observations of the total solar eclipse of 14 December 2020, during which a coronal mass ejection can be see n propagating. A comprehensive set of photographs covering a high dynamic range of exposure allow to characterize its…

Solar and Stellar Astrophysics · Physics 2021-08-06 Guillermo Abramson

Solar cycle activity forecasting, mainly its magnitude and timing, is an essential issue for numerous scientific and technological applications: in fact, during an active solar period, many strong eruptions occur on the Sun with increasing…

Solar and Stellar Astrophysics · Physics 2012-10-01 Stefano Sello

We present in this reference paper an instrumental project dedicated to the monitoring of solar activity during solar cycle 25. It concerns the survey of fast evolving chromospheric events implied in Space Weather, such as flares, coronal…

Instrumentation and Methods for Astrophysics · Physics 2023-02-01 Jean-Marie Malherbe , Thierry Corbard , Gaële Barbary , Frédéric Morand , Claude Collin , Daniel Crussaire , Florence Guitton

The search of a rational explanation of eclipses pervades the beginnings of philosophical and scientific thought. Within this intellectual frame, the knowledge of the "saros cycle" (a cycle of 18 years, 10 or 11 days and 1/3 of a day that…

History and Philosophy of Physics · Physics 2013-04-30 Roberto Casazza , Alejandro Gangui

On 21 August 2017 a total solar eclipse swept across the contiguous United States providing excellent opportunities for diagnostics of the Sun's corona. The Sun's coronal structure is notoriously difficult to observe except during solar…

Solar and Stellar Astrophysics · Physics 2017-10-03 Dibyendu Nandy , Prantika Bhowmik , Anthony R. Yeates , Suman Panda , Rajashik Tarafder , Soumyaranjan Dash

The Deep Ecliptic Survey is a project whose goal is to survey a large area of the near-ecliptic region to a faint limiting magnitude (R ~ 24) in search of objects in the outer solar system. We are collecting a large homogeneous data sample…

Observations of the Sun and of Sun-like stars provide access to different aspects of stellar magnetic activity that, when combined, help us piece together a more comprehensive picture than can be achieved from only the solar or the stellar…

Solar and Stellar Astrophysics · Physics 2010-12-14 Carolus J. Schrijver

Our knowledge of the Sun, its atmosphere, long term activity and space weather potential is severely limited by the lack of good observations of the polar and far-side regions. Observations from a polar vantage point would revolutionize our…

Instrumentation and Methods for Astrophysics · Physics 2018-05-14 A. Vourlidas , P. C. Liewer , M. Velli , D. Webb

The value of the eclipse solar radius during the 2017 August 21 total solar eclipse was estimated to be $S_{\odot} = (959.95\pm 0.05)"$ at $1\,au$ with no significant dependence on wavelength. The measurement was obtained from the analysis…

Solar and Stellar Astrophysics · Physics 2021-09-30 Luca Quaglia , John Irwin , Konstantinos Emmanouilidis , Alessandro Pessi

While Transiting Exoplanet Survey Satellite (TESS) covers a considerable area of the sky during routine observations and the pointing schedule is easy to follow, it is not obvious to retrieve the current and/or predicted visibility of a…

Instrumentation and Methods for Astrophysics · Physics 2020-12-03 András Pál

The possibilities of organizing an observation service for solar activity in order to provide space weather forecasting are considered. The most promising at this stage is the creation of a ground-based observation network. Such a network…

Solar and Stellar Astrophysics · Physics 2023-03-06 A. G. Tlatov , A. A. Pevtsov

Historical records of total solar eclipses provide vital information for computing the rotation of the Earth and understanding its long-term variations by providing data from the time before the modern measurements. While eclipses recorded…

Earth and Planetary Astrophysics · Physics 2021-08-26 Hisashi Hayakawa , Misturu Sôma , J. Hutch Kinsman

A review of solar cycle prediction methods and their performance is given, including early forecasts for cycle 25. The review focuses on those aspects of the solar cycle prediction problem that have a bearing on dynamo theory. The scope of…

Solar and Stellar Astrophysics · Physics 2020-03-05 Kristof Petrovay