The Hubble Space Telescope recently captured an image of the irregular galaxy ESO 300-16, located 28.7 million light-years away in the southern constellation of Eridanus. Irregular galaxies lack a distinct regular shape, differing from spiral or elliptical galaxies. These galaxies come in various sizes, from dwarf to large, containing substantial amounts of gas and dust.
Irregular galaxies can form through collisions between galaxies, resulting in unique rotations. The Hubble Space Telescope, constructed under NASA’s supervision, has revolutionized astronomy. Launched in 1990, it’s larger than a school bus, boasts a 7.9 feet mirror, and has provided invaluable observations that deepen our understanding of the universe.
What to study for prelims?
- Dwarf Irregular Galaxies: Dwarf irregular galaxies are small galaxies lacking symmetry. They vary in mass and often contain young and old stars.
- Spiral and Elliptical Galaxies: Spiral galaxies have a distinct spiral structure, while elliptical galaxies have an oval or elliptical shape.
- Galaxy Interactions and Collisions: Irregular galaxies can form through interactions or collisions between galaxies, resulting in unique rotations and mixed stellar populations.
- Edwin Hubble: Edwin Hubble was a prominent American astronomer known for his contributions to cosmology, including the discovery of the expansion of the universe.
- Hubble Space Telescope (HST): The HST is a space telescope launched by NASA in 1990. It has provided invaluable observations, playing a crucial role in expanding our understanding of the cosmos.
- Observations and Research Papers: The HST’s observations have led to the publication of numerous research papers, contributing to various aspects of astronomy.
- Mirror Size: The mirror of the HST measures 7.9 feet in diameter, allowing it to capture high-resolution images of distant celestial objects.
