Results 61 to 70 of about 3,068 (209)

Polka-dotted Stars: A Hierarchical Model for Mapping Stellar Surfaces Using Occultation Light Curves and the Case of TOI-3884

The Astrophysical Journal
We present StarryStarryProcess , a novel hierarchical Bayesian framework for mapping stellar surfaces using exoplanet transit light curves. While previous methods relied solely on stellar rotational light curves—which contain limited information about ...
Sabina Sagynbayeva, Will M. Farr, Brett M. Morris, Rodrigo Luger   +3 more
doaj   +1 more source

Autonomous Navigation Method for Planetary Landing Based on Observability Analysis of Sequential Images

Guidance, Navigation and Control
Sequential images provided by optical cameras are ideal for realizing high-precision autonomous navigation for planetary landings, but due to limited computational resources, a large amount of image information cannot be processed on deep space probes ...
Jiaxing Li, Dayi Wang, Runran Deng, Tianshu Dong, Bowen Hou   +4 more
doaj   +1 more source

Multispacecraft observations and modeling of the 22/23 June 2015 geomagnetic storm

Geophysical Research Letters, 2016
The magnetic storm of 22–23 June 2015 was one of the largest in the current solar cycle. We present in situ observations from the Magnetospheric Multiscale Mission (MMS) and the Van Allen Probes (VAP) in the magnetotail, field‐aligned currents from ...
P. H. Reiff, A. G. Daou, S. Y. Sazykin, R. Nakamura, M. R. Hairston, V. Coffey, M. O. Chandler, B. J. Anderson, C. T. Russell, D. Welling, S. A. Fuselier, K. J. Genestreti   +11 more
doaj   +1 more source

A framework for the architecture of exoplanetary systems. I. Four classes of planetary system architecture

, 2023
We present a novel, model-independent framework for studying the architecture of an exoplanetary system at the system level. This framework allows us to characterise, quantify, and classify the architecture of an individual planetary system.
Lokesh Mishra, Mishra, Lokesh, Alibert, Yann, Yann Alibert, Christoph Mordasini, Mordasini, Christoph, Stéphane Udry, Udry, Stéphane   +7 more
core   +1 more source

Shock Layer Radiation Measurements for Planetary Probes

, 2018
Shock layer radiation to a planetary probe's heat shield has been investigated since the 1960's, using ground tests, flight tests, and theoretical modelling.
MacDonald, Megan, Miller, Ruth, White, Susan, Cruden, Brett   +3 more
core  

Robots and Humans in Planetary Exploration: Working Together?

, 2002
Today's approach to human-robotic cooperation in planetary exploration focuses on using robotic probes as precursors to human exploration. A large portion of current NASA planetary surface exploration is focussed on Mars, and robotic probes are seen as ...
Lyons, Valerie, Landis, Geoffrey A.
core  

Supercooling, Glass Formation, and Mineral Assemblages upon Freezing of Salty Ice Grains from Enceladus’s Ocean

The Planetary Science Journal
The analysis of micrometer-sized ice grains emitted into space by Saturn’s moon Enceladus suggests that the moon’s subsurface ocean may be habitable. However, the formation conditions of these ice grains are largely unknown.
Fabian Klenner, Lucas M. Fifer, Baptiste Journaux, Ardith D. Bravenec, Allan M. M. Leal, Steven D. Vance, David C. Catling   +6 more
doaj   +1 more source

Direct exoplanet investigation using interstellar space probes

, 2017
Experience in exploring our own solar system has shown that direct investigation of planetary bodies using space probes invariably yields scientific knowledge not otherwise obtainable.
Ian A. Crawford, Crawford, Ian
core   +1 more source

Planetary Nebulae surveys: Past, Present and Future

, 2010
In this review we cover the detection, identification and astrophysical importance of planetary nebulae (PN). The legacy of the historic Perek & Kohoutek and Acker et al.
Frew, DJ, Parker, QA
core  

Planetary nebulae as probes for galactic chemical evolution

Proceedings of the International Astronomical Union, 2006
The role of planetary nebulae as probes of galactic chemical evolution is reviewed. Their abundances throughout the Galaxy are discussed for key elements, in particular oxygen and other alpha elements. The abundance distribution derived from planetary nebulae leads to the establishment of radial abundance gradients in the galactic disk that are ...
Costa, Roberto D. D., Maciel, Walter J.
openaire   +2 more sources