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Tachibana Lab
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A lab that uncovers the chemistry of the solar system's beginnings through experiments, analysis, and exploration.
AboutAbout the lab
Tracing the origin of the solar system through experiments and analysis.
The Tachibana Lab studies how the diverse planets of the solar system, including Earth, were formed.
By combining laboratory experiments, analysis of extraterrestrial materials, astronomical observation, modeling, and solar system exploration, the lab investigates the chemical evolution of the early solar system.
The lab experimentally investigates evaporation, condensation, phase transitions, and isotopic fractionation of silicates, metallic iron, and iron sulfides, and incorporates the resulting reaction rates into models of dust dynamics.
The lab takes part in the asteroid sample-return missions Hayabusa2 and OSIRIS-REx. In Hayabusa2, Professor Tachibana led the development of the sampler and coordinated the initial analysis of the Ryugu samples.
Key terms
- Chondrite
- The most common type of meteorite, containing small spherical grains called chondrules
- Protoplanetary disk
- A disk of gas and dust surrounding a newly formed star
- Presolar grain
- A microscopic grain that formed around another star before the solar system was born
ResearchResearch themes
The lab seeks to understand how the diverse planets of the solar system, including Earth, were formed. By combining laboratory experiments, analysis of extraterrestrial materials, astronomical observation, modeling, and solar system exploration, it investigates the chemical evolution of the early solar system.
*Illustrative imageChemical Evolution of the Early Solar System
The lab studies the kinetics of evaporation, vapor-phase growth, and gas-solid reactions, and connects the results to chondrite chemical groups, the bulk composition of terrestrial planets, protoplanetary disks, and solar system chronology.
*Illustrative imageThe Galaxy, Molecular Clouds, and the Solar System
Using nucleosynthesis, short-lived radionuclides, and supernovae as clues, the lab investigates the environment in which the solar system formed and the molecular cloud from which it originated. The photochemistry of ices and organic matter is also studied.
*Illustrative imageDust Formation around Stars
The lab studies how dust forms in the winds blown out from evolved stars. Presolar grains, infrared astronomical observations, and crystalline and amorphous silicates and oxides serve as key clues.
*Illustrative imageFormation of Chondrite Components
The lab examines how the components of chondrites, such as Ca- and Al-rich inclusions, chondrules, metallic iron, iron sulfides, amorphous silicates, and organic matter, are altered by melting, crystallization, isotopic exchange, and reactions with water.
MembersFaculty
- ProfessorShogo TachibanaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “HL Tau protoplanetary disk” ALMA (ESO/NAOJ/NRAO) / CC BY 4.0 (cropped)
- Chemical Evolution of the Early Solar System: “Artist’s impression of grains in the disc around a brown dwarf (eso1248b)” ALMA (ESO/NAOJ/NRAO)/L. Calçada (ESO) / CC BY 4.0 (cropped)
- The Galaxy, Molecular Clouds, and the Solar System: “Infrared Rho Ophiuchi Complex” Judy Schmidt / CC BY 2.0 (cropped)
- Dust Formation around Stars: “Structure of the pulsating red giant S Ori (artist's impression)” ESO / CC BY 4.0 (cropped)
- Formation of Chondrite Components: “Hart CK3 Chondrule-5mmFOV-01” North Creaton / CC BY-SA 4.0 (cropped)
- Related lab (黒川研究室(Kurokawa-lab)): “HL Tau protoplanetary disk” ALMA (ESO/NAOJ/NRAO) / CC BY 4.0 (cropped)
- Related lab (竝木研究室
（RISE 月惑星探査検討室） ): “PIA16587 - GRAIL's Gravity Field of the Moon” NASA/ARC/MIT / Public domain (cropped) - Related lab (天野研究室): “Supernova Remnant SN 1006” X-ray: NASA/CXC/Rutgers/G.Cassam-Chenaï, J.Hughes et al.; Radio: NRAO/AUI/NSF/GBT/VLA/Dyer, Maddalena & Cornwell; Optical: Middlebury College/F.Winkler, NOAO/AURA/NSF/CTIO Schmidt & DSS / CC BY 4.0 (cropped)
- Related lab (生駒研究室
（系外惑星理論グループ） ): “Artist's Impression of Kepler 138 Planetary System (2022-048)” NASA, ESA, Leah Hustak (STScI) / CC BY 4.0 (cropped)
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