Russia's long-delayed lab module successfully docked with the International Space Station on Thursday, eight days after it was launched from the Russian space launch facility in Baikonur, Kazakhstan.

The 20-metric-ton (22-ton) Nauka module, also called the Multipurpose Laboratory Module, docked with the orbiting outpost after a long journey and a series of maneuvers.

The launch of Nauka, which is intended to provide more room for scientific experiments and space for the crew, had been repeatedly delayed because of technical problems. It was initially scheduled to go up in 2007.

In 2013, experts found contamination in its fuel system, resulting in a long and costly replacement. Other Nauka systems also underwent modernization or repairs.

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When it launches in the mid-2020s, NASA's Nancy Grace Roman Space Telescope will revolutionize astronomy by building on the science discoveries and technological leaps of the Hubble, Spitzer, and Webb space telescopes. The mission's wide field of view and superb resolution will enable scientists to conduct sweeping cosmic surveys, yielding a wealth of information about celestial realms from our solar system to the edge of the observable universe.

On July 23rd, the Roman Space Telescope successfully completed the critical design review of the mission's ground systems, which are spread over multiple institutions including the Space Telescope Science Institute (STScI) in Baltimore, Maryland; NASA's Goddard Space Flight Center in Greenbelt, Maryland; and Caltech/IPAC in Pasadena, California. STScI will host the Science Operations Center (SOC) while Goddard will provide the Mission Operations Center and Caltech/IPAC will house the Science Support Center. The passing of the critical design review means the plan for science operations provides all the necessary data processing and archiving capabilities. The mission will now proceed to the next phase: building and testing the newly designed systems that will enable planning and scheduling of Roman observations and managing the resulting data, anticipated to be over 20 petabytes (20,000,000 GB) within the first five years of operations.

Can we find alien technology? That is the ambitious goal of the Galileo Project, launched this week by Harvard astrophysicist Avi Loeb with substantial private financial backing.

The project is far from the first attempt to detect signs of civilisations beyond Earth. Loeb has been criticized in the past for his dismissive approach to previous efforts to find extraterrestrial life and his argument that an alien artifact passed through our solar system in 2017.

So why do Loeb and his collaborators think they have a chance of finding something where others have failed? There are three triggers that suggest they might.

Exoplanets, "Oumuamua, and UFOs

First, years of painstaking observations have shown that many stars host Earth-like planets. There is a real chance these "exoplanets" might be home to alien civilisations.

Second, five years ago, an interstellar visitor, dubbed "Oumuamua, tumbled though our solar system. It was a skinny object about 400 meters long, and we know from its speed and trajectory that it arrived from outside our solar system. It was the first time we had ever seen an interstellar object enter our neighborhood.