Irmgard Marboe is professor of international law at the University of Vienna, Austria. She has widely published on international space law and acted as expert in various functions in the UN Committee on the Peaceful Uses of Outer Space (UNCOPUOS).

• ForewordAcknowledgementsList of Figures and TablesList of Acronyms and AbbreviationsList of Legal DocumentsNotes on ContributorsIntroductionIrmgard Marboepart 1: Planetary Defence and International Cooperative Efforts1 Near-Earth Objects – Basic Terms and CharacteristicsChristian Koeberl and Cordula Steinkogler2 What Is Planetary Defence?Rüdiger Jehn3 Planetary Defence TechnologiesAlan Harris4 International Cooperation in Planetary Defence – UNCOPUOS, IAWN and SMPAGGerhard Drolshagen, Lindley N Johnson and Romana Kofler5 Enhancing Public AwarenessThe Establishment of ‘Asteroid Day’Frans von der Dunk6 The United States Planetary Defence ProgrammeNASA and the Planetary Defense Coordination OfficeVictoria P Andrews, Doris Daou, Lindley N Johnson7 ESA’S Activities in Planetary DefenceDetlef Koschny8 Planetary Defence Activities beyond NASA and ESABrent W Barbeepart 2: Legal Analysis of Different Aspects of Planetary Defence9 Overview of Current International Space Law in the Context of Planetary DefenceSteven Freeland10 The 2010 Report on Legal Aspects of NEO Threat Response and Related Institutional IssuesFrans von der Dunk11 The SMPAG Ad-hoc Working Group on Legal IssuesLine Drube12 International Law Rules Related to the Sharing of Information about Potential NEO ThreatsIrmgard Marboe13 Rules of International Law Regarding an Obligation of States to Undertake Planetary Defence ActivitiesCordula Steinkogler14 The Use of Force and Planetary DefenceSetsuko Aoki15 Legal Aspects of the Use of Nuclear Explosive Devices in Planetary DefenceDavid A Koplow16 Nuclear Non-Proliferation and Planetary DefenceCompeting Potential DisastersJack M Beard17 Understanding the Social Aspects of an Asteroid Impact Threat from Socio-Anthropological Lessons Learned in Natural Disaster ManagementAlissa Haddaji18 The Current International Space Law Regime on Liability and Its Application to Planetary DefenceAlexander Soucek19 Critical Issues and Future Perspectives on Liability in the Context of Planetary DefenceHenry Hertzfeld20 The International Responsibility of States for Planetary Defence ActivitiesSergio Marchisio21 The Involvement of Private Actors in Planetary Defence MissionsPeter Stubbe22 International Bodies and Procedures for Decision-Making Regarding Planetary Defence ActionsOlavo de Oliveira Bittencourt NetoConclusions and Considerations on the Way ForwardIrmgard MarboeIndex