THIS DAY IN SPACE

Launch of First Internet Domain Symbolics.com
On March 15, 1985, the first domain name ever registered on the Internet—symbolics.com—was officially activated. Registered by Symbolics, Inc., a computer manufacturer based in Cambridge, Massachusetts, this event marked the beginning of the commercial digital identity era. The domain name system (DNS) had only recently been established to simplify the growing complexity of accessing hosts on the early Internet, replacing numerical IP addresses with more memorable names. Symbolics.com was created as a means for the company to establish its digital presence, long before the dot-com boom of the 1990s. Though few realized it at the time, this moment heralded a revolution in how people and businesses would interact online. Today, over 350 million domain names exist globally, and symbolics.com still remains active as a historic artifact. The birth of domain names transformed the architecture of the web, paving the way for branding, e-commerce, and personal websites. March 15 is remembered as the starting point of digital real estate, giving rise to the web as we know it.

ExoMars Mission Launched by ESA and Roscosmos
On March 15, 2016, the European Space Agency (ESA) and Roscosmos launched the first phase of the ExoMars program from Baikonur Cosmodrome. The mission’s primary component, the Trace Gas Orbiter (TGO), was designed to study atmospheric gases on Mars—especially methane, a potential biosignature. Accompanying TGO was a lander named Schiaparelli, intended as a technology demonstrator for future landings. Although Schiaparelli later crashed on the Martian surface, TGO entered orbit successfully and began delivering high-resolution data about the Martian atmosphere. The mission represented a significant collaboration between Europe and Russia in space exploration. ExoMars aimed to search for evidence of past or present life, understand surface environments, and prepare for human exploration. March 15 marked a bold step forward in the ongoing international effort to unlock Mars's mysteries, particularly focusing on the trace amounts of methane detected by earlier missions. The TGO continues to be a vital communications relay and atmospheric observer. The mission is viewed as a crucial building block for future human and robotic missions to Mars.