3rd June 2024 (12 Topics)

Copy

1 Jun

3 Jun

4 Jun

5 Jun

6 Jun

7 Jun

8 Jun

10 Jun

11 Jun

12 Jun

13 Jun

14 Jun

15 Jun

17 Jun

18 Jun

19 Jun

20 Jun

21 Jun

22 Jun

24 Jun

25 Jun

26 Jun

27 Jun

28 Jun

29 Jun

Discovery of Earliest-known Galaxy by JWST

Context

NASA's James Webb Space Telescope (JWST) has uncovered a remarkable find - the earliest-known galaxy, challenging previous assumptions about the universe's infancy. This galaxy, named JADES-GS-z14-0, was observed approximately 290 million years after the Big Bang, during a period known as cosmic dawn.

Key Findings:

JADES-GS-z14-0 measures about 1,700 light years across and possesses a mass equivalent to 500 million stars like sun.
Despite its early formation, it was rapidly generating stars, approximately 20 per year.
Surprising Brightness: The brightness and size of this early galaxy defy previous expectations. Scientists were astonished by its luminosity, as it was larger and brighter than anticipated for a galaxy at this early stage.
Comparison: While notable for its time, JADES-GS-z14-0 is dwarfed by present-day galaxies like Milky Way, which spans about 100,000 light years and contains the mass of around 10 billion sun-sized stars.
Second Discovery: In addition to JADES-GS-z14-0, the JWST also identified the second oldest-known galaxy, JADES-GS-z14-1, dating back approximately 303 million years post-Big Bang. This galaxy, although smaller, still exhibited significant star formation.
Implications: These discoveries challenge existing theories about early galaxy formation. They hint at a denser, more gas-rich environment in the early universe, with star formation processes differing markedly from those seen today.

Fact Box: About James Webb Space Telescope (JWST)

JWST is a cutting-edge observatory designed for infrared observations, equipped with advanced instruments to address key questions in astronomy.
Named after former NASA administrator James E. Webb, it represents a collaboration between NASA, the European Space Agency (ESA), and the Canadian Space Agency.
Key Features:
- Optimized for Infrared: JWST boasts a large aperture telescope tailored for infrared observations, enabling it to explore a wide range of astronomical phenomena.
- Operational Orbit: Positioned at the Earth-Sun L2 Lagrange point, about 1.5 million kilometers away from Earth, JWST benefits from simplified operation, pointing, and stability requirements compared to the Hubble Space Telescope.
- Temperature Control: Operating at an ultra-low temperature of -233°C (-387°F), JWST's instruments are kept cold to prevent their own infrared emissions from interfering with astronomical signals.

L2 Point Explanation:

Lagrange Points are regions where the gravitational forces of the Sun and Earth balance the orbital motion of a satellite, allowing it to maintain a fixed position relative to both celestial bodies with minimal energy expenditure.
L2 Point: Specifically, the second Lagrange Point (L2) is one of five such points in space. Placing a spacecraft at L2 enables it to remain in a stable position relative to the Earth and Sun.

The message from the Andhra Pradesh bifurcation

Polity & Governance Union and the States

China’s Proposal for a No-First-Use Treaty

International Relations International Organization

Indian Economy: We Still Have a Long Way Ahead

Economy Growth and Development

Addressing Poor Electricity Supply for Farmers

Polity & Governance Governance

Amendments to IHR 2005

Polity & Governance Governance

Inequality and Growth

Economy Growth and Development

Red Flag Exercise and RIMPAC Exercise

International Relations Military exercises

OPEC+ extends oil output cuts

Economy Trade and Commerce

Breakthrough in Nipah Virus Research

Science & Technology General Science (Issues related to health)

China's Chang'e-6 Mission

Science & Technology Satellites and Launch Vehicles

GS Analyst: Daily Current Affairs

Discovery of Earliest-known Galaxy by JWST

Key Findings:

Fact Box: About James Webb Space Telescope (JWST)

User Login

User Register

Forgot Password

Verify Your Mobile Number