Bigbun.com

Hubble Space Telescope: Starstruck in Terzan 4

Hubble Space Telescope of globular cluster Terzan 4. Credit: ESA/Hubble & NASA, R. Cohen

A glittering multitude of stars in the globular cluster Terzan 4 fills this image from the Hubble Space Telescope. Globular clusters are collections of stars bound together by their mutual gravitational attraction, and can contain millions of individual stars. As this image shows, the heart of a globular cluster such as Terzan 4 is a densely packed, crowded field of stars — which makes for spectacular images!

The launch of Hubble in 1990 revolutionized the study of globular clusters. The individual stars in these dense crowds are almost impossible to distinguish from one another with ground-based telescopes, but can be picked apart using space telescopes. Astronomers have taken advantage of Hubble’s crystal-clear vision to study the stars making up globular clusters, as well as how these systems change over time.

This particular observation comes from astronomers using Hubble to explore Terzan 4 and other globular clusters to understand the shape, density, age, and structure of globular clusters close to the center of the Milky Way. Unlike globular clusters elsewhere in the sky, these globular clusters have evaded detailed observation because of the clouds of gas and dust swirling around the galactic core. These clouds blot out starlight in a process that astronomers refer to as ‘extinction’, and complicate astronomical observations.

Astronomers took advantage of the sensitivity of two of Hubble’s instruments — the Advanced Camera for Surveys and Wide Field Camera 3 — to overcome the impact of extinction on Terzan 4. By combining Hubble imagery with sophisticated data processing, astronomers were able to determine the ages of galactic globular clusters to within a billion years — a relatively accurate measurement in astronomical terms!

Related posts

Novel Metal Discovered Where Electrons Flow in the Same Way Water Flows in a Pipe

BLGBUN

Significant Breakthrough in Search for Tinnitus Cure

BLGBUN

Aluminum-26 Unveils the Hearts of Dying Stars

BLGBUN

Bees Are Dying in Large Numbers Around the World – Plant Compound May Protect Them From Deadly Virus

BLGBUN

The Hidden US COVID-19 Pandemic: Orphaned children

BLGBUN

Space Station Crew Unpacks Cargo Dragon and Starts New Research

BLGBUN