Alpha Centauri is our closest stellar neighbor, a binary star system located just 4.376 light-years away. Despite its proximity, repeated astronomical surveys have failed to find hard evidence of extrasolar planets in this system. Part of the problem is that the system consists of two stars orbiting each other, which makes detecting exoplanets through the two most popular methods very challenging. In 2019, Breakthrough Initiatives announced they were backing a new project to find exoplanets next door—the Telescope for Orbit Locus Interferometric Monitoring of our Astronomical Neighborhood (TOLIMAN, after the star's ancient name in Arabic).

This low-cost mission concept was designed by a team from the University of Sydney, Australia, and aims to look for potentially-habitable exoplanets in the Alpha Centauri system using the Astrometry Method.

The world's first 3D printed rocket is scheduled to make its third attempt to lift off on Wednesday for the maiden flight of an innovative spacecraft billed as being less costly to produce and fly.

The unmanned rocket, Terran 1, had been scheduled to launch on March 8 from Cape Canaveral, Florida, but it was postponed at the last minute because of propellant temperature issues.

A second attempt on March 11 was scrubbed due to fuel pressure problems.

Relativity Space, the California private aerospace startup that built the rocket, is hoping that the third time's the charm.

The company's three-hour launch window begins at 10:00 pm Eastern Time on Wednesday (0200 GMT Thursday).

Once it does take off, Terran 1 is set to reach low Earth orbit after eight minutes on a voyage intended to gather data and demonstrate that a 3D-printed rocket can withstand the rigors of liftoff and space flight.

The cohesive force of asteroid particles influence microgravity and can be evaluated under several assumptions of particle size and their sensitivity to particle shape. Approximately hundreds of kilograms of material fall on to Earth's atmosphere daily from space, and filter down as tiny grains and fine dust. Many meteorites that reach Earth from space are pieces of asteroids.

In a new report now published in Science Advances, Yuuya Nagaashi and a research team in planetology at the Kobe University in Japan, conducted cohesive force measurements of meteorite fragments. The cohesive force of the asteroid particles were orders of magnitude smaller, resulting in the high mobility of asteroid surface particles identified during space exploration. For astrobiologists interested in the earliest history of Earth and the solar system, these particles that have survived almost unaltered offer significant information of the earliest period of the solar system's history.