The International Astronomical Union (IAU) is the international organization that brings together astronomers from around the world to promote and coordinate astronomy research and development.

The Very Large Telescope (VLT) is the largest and most powerful ground-based telescope in the world, located in the Atacama Desert of Chile. It is operated by the European Southern Observatory (ESO), which is a collaboration of 16 countries.

The International Space Station (ISS) is a joint project of five participating space agencies: NASA (United States), ESA (Europe), JAXA (Japan), CSA (Canada), and Roscosmos (Russia).

The Thirty Meter Telescope (TMT) is an international collaboration to build a next-generation extremely large telescope (ELT) with a 30-meter primary mirror. The TMT project involves partners from the United States, Canada, China, India, and Japan.

The International Union of Radio Science (URSI) is the international organization that coordinates and promotes radio astronomy research and development. It brings together scientists from all over the world to advance the field of radio astronomy.

The Einstein Telescope is an international collaboration to build a next-generation gravitational wave observatory with enhanced sensitivity and reach. The project involves partners from Europe, the United States, and Japan.

The International Space Exploration Coordination Group (ISECG) is the international organization that coordinates and promotes space exploration and research. It brings together space agencies from around the world to collaborate on space exploration missions and initiatives.

The Daniel K. Inouye Solar Telescope (DKIST) is an international collaboration to build a next-generation solar telescope with a 4-meter primary mirror. The DKIST project involves partners from the United States, Japan, and Europe.

The International Astronomical Union (IAU) is the international organization that coordinates and promotes astronomy education and outreach. It brings together astronomers from around the world to develop and implement astronomy education programs and resources.

Hyper-Kamiokande is an international collaboration to build a next-generation neutrino observatory with a 260-kiloton water Cherenkov detector. The Hyper-Kamiokande project involves partners from Japan, the United States, and Europe.

The International Virtual Observatory Alliance (IVOA) is the international organization that coordinates and promotes astronomical data sharing and interoperability. It brings together astronomers from around the world to develop and implement standards and protocols for astronomical data sharing.

Cosmic Microwave Background Stage-4 (CMB-S4) is an international collaboration to build a next-generation cosmic microwave background observatory with enhanced sensitivity and angular resolution. The CMB-S4 project involves partners from the United States, Europe, and Japan.

The Office for Astronomy Development (OAD) is the international organization that coordinates and promotes astronomy for development. It brings together astronomers, educators, and policymakers from around the world to use astronomy to address global challenges and promote sustainable development.

Athena is an international collaboration to build a next-generation X-ray observatory with enhanced sensitivity and spectral resolution. The Athena project involves partners from Europe, the United States, and Japan.

The International Astronomical Union (IAU) is the international organization that coordinates and promotes astronomy in developing countries. It brings together astronomers from around the world to provide support and resources to astronomers in developing countries, and to promote the development of astronomy in these countries.