Astronomer Amina Helmi and an international team of scientists from the University of Groningen have found the oldest giant into which the Milky Way had merged. Gaia-Enceladus is the large galaxy which makes up almost its entire halo along with its thick disk forming an inflated version.
The researchers state that the smaller galaxies make up the larger galaxies like our Milky Way. Thus, Helmi is trying to look for fossil remains in our galaxy so as to help make a tree regarding its evolution. According to her, the chemicals compositions, the course of occurrence, and position of the star in the halo will help recognize the creators of the Milky Way. From the data obtained from the Gaia satellite mission, a common origin of most of the halo stars could be concluded which can help find pieces of the mergers in the halo. The chemical compositions of the numerous stars present in the halo were found to be totally different from the inhabitant Milky Way stars.
During the researching, the youngest star from the giant Gaia-Enceladus is actually found to be younger than our Milky Way stars which now the thick disk formed around the galaxy. The merger of the disk was already present when the fusion occurred and puffed up in the long course. The debris from the huge blob of stars is considered to be the result of the merging of our galaxy with the massive Gaia-Enceladus galaxy. The new Gaia data on the chemistry, spatial distribution, kinematics, and age obtained from the remnants of Gaia-Enceladus and the native Milky Way stars helps broaden the researchers’ horizons.
NASA is presently working on making shipments to a future lunar space station using Lunar Orbital Platform-Gateway which is a space station that is projected to orbit the moon and host astronauts sometime in the start of 2020s. Right now, NASA has giant companies building a robotic arm, Space Launch System along with the Gateway for carrying pressurized and unpressurized cargo during the mission.