Results 111 to 120 of about 9,980 (290)

Dynamics in the solar system (Free Astronomy Public Lectures) [PDF]

, 2011
The clockwork-like motion of the planets around the Sun is well understood thanks to Newton's universal law of gravitation. Using Newtonian physics and some simple mathematical equations, we can describe (and predict) the motion of a planet around the ...
Sarah Maddison
core  

Perihelion Asymmetry in the Water Production Rate of the Interstellar Object 3I/ATLAS

The Astrophysical Journal Letters
3I/ATLAS is an interstellar object whose activity provides critical insights into its composition and origin. However, due to its orbital geometry, the object is too close to the Sun near perihelion to be observed from the ground, and space-based ...
Hanjie Tan, Xiaoran Yan, Jian-Yang Li
doaj   +1 more source

Spatiotemporal Analysis of Dust Devils in the Preselected Landing Area for Tianwen-3: A Case Study of Chryse Planitia

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Tianwen-3 Mars Sample Return Mission is scheduled for launch in 2028, with a return expected in ∼2030. Dust devils (DDs) play a crucial role in the thermal structure of the Martian atmospheric boundary layer. Additionally, the formation process of
Yu Yang, Bo Li, Zhaojin Rong, Shaojie Qu, Xuan Cheng   +4 more
doaj   +1 more source

Thermal histories of El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155): Implications for the diversity of IAB‐ungrouped iron meteorites and their parent bodies

Meteoritics &Planetary Science, EarlyView.
Abstract This study provides the first petrographic, crystallographic, and chemical comparison between El Médano 300 (EM 300) and Northwest Africa 8155 (NWA 8155), two particular IAB‐ungrouped iron meteorites. Both contain exceptionally large graphite nodules and “flowers”, providing unique insights into carbon behavior in metallic melts and cooling ...
L. Perez, M. Roskosz, F. Danoix, L. Kern, V. Megevand, C. Brillatz, B. Devouard, J. Gattacceca, M. Gounelle   +8 more
wiley   +1 more source

Solar sail trajectories at the Earth-Moon Lagrange points [PDF]

, 2008
Paper presented during Session 3, Orbital Dynamics, Symposium C1, Astrodynamics, Paper Number 13. This paper investigates displaced periodic orbits at linear order in the circular restricted Earth-Moon system, where the third massless body is a solar ...
Simo, J., Simo, Jules, McInnes, Colin R., McInnes, C.R.   +3 more
core  

Orbital and Absolute Magnitude Distribution of Hilda Population

The Astronomical Journal
The Hilda population of asteroids is located in a large orbital zone of long-term stability associated with the Jupiter J3/2 mean-motion resonance. They are a sister population of the Jupiter Trojans, since both of them are likely made up of objects ...
David Vokrouhlický, David Nesvorný, Miroslav Brož, William F. Bottke, Rogerio Deienno, Carson D. Fuls, Frank C. Shelly   +6 more
doaj   +1 more source

Reassessing the organic carbon budget in the Murchison meteorite through an extraction–recovery mass‐balance approach

Meteoritics &Planetary Science, EarlyView.
Abstract A substantial fraction of organic carbon in carbonaceous chondrites has long been described as “missing,” reflecting incomplete recovery and limited resolution of operationally defined organic components. Here, we present a quantitative reassessment of the carbon budget in the Murchison meteorite using an integrated extraction–recovery mass ...
Hina Dohi, Minako Hashiguchi, Koichi Mimura   +2 more
wiley   +1 more source

Visible, near‐, and thermal infrared spectra of asteroid Bennu samples: Relationship to and implications for remote sensing of carbonaceous asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract Remote spectroscopy is used to characterize the mineralogy and infer the history of planetary bodies. Carbonaceous asteroids, such as B‐type (101955) Bennu, represent the earliest stages of planet formation. B types have a blue (negative) spectral slope and comprise <5% of asteroids.
V. E. Hamilton, E. A. Cloutis, R. E. Milliken, P. Haenecour, D. R. Golish, K. J. Domanik, T. J. McCoy, L. P. Keller, A. A. Simon, H. H. Kaplan, C. A. Goodrich, S. A. Sandford, D. Applin, T. Hiroi, D. H. Hill, N. G. Lunning, F. M. McCubbin, S. A. Eckley, C. J. Snead, E. H. Blumenfeld, J. E. Aebersold, C. Schultz, N. Bowles, K. A. Shirley, S. S. Russell, J. J. Barnes, T. J. Zega, D. N. DellaGiustina, A. J. Ryan, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr., D. S. Lauretta   +32 more
wiley   +1 more source

Mission and system design of a 3U CubeSat for passive GTO to LEO transfer [PDF]

, 2012
This paper denotes a mission concept and system design for a 3U CubeSat technology demonstration. The spacecraft carries an inflatable, ejectable balloon that is used to engineer its area-to-mass-ratio.
Colombo, Camilla, McInnes, Colin, Mclnnes, Colin R., Lucking, Charlotte   +3 more
core  

Advanced aqueous alteration in primitive meteorites: Micro‐ to nanoscale studies of CR1 iron sulfides

Meteoritics &Planetary Science, EarlyView.
Abstract This study documents micro‐ to nanoscale observations of primary nebular and secondary parent body iron sulfides in the CR1 GRO 95577. Despite the extensive alteration of the bulk sample, some primary sulfides managed to avoid alteration, having originally formed in the solar nebula during chondrule formation by either fission‐sulfidization or
S. A. Singerling
wiley   +1 more source