Metropedia -Inikah Titik Terjauh Alam Semesta? - [Metro Siang]

Summary

This video explores the vastness of the universe and the mystery surrounding it, focusing on recent discoveries such as the farthest blazar ever found, J041139. The video explains how scientists use various telescopes, like Hubble and James Webb, to observe distant cosmic objects. Blazars, a type of active galaxy core, emit powerful radiation and are linked to supermassive black holes. The recent discovery of J041139, located 13 billion light-years away, provides valuable insights into the early universe's evolution and the formation of galaxies. Despite their power, blazars pose no threat to Earth due to their immense distance.

Takeaways

• 😀 The universe is vast and full of mysteries, with new discoveries constantly being made as technology advances.
• 😀 Scientists use various techniques and instruments, such as telescopes, to observe distant objects in space without traveling far.
• 😀 Telescopes like the Hubble Space Telescope and James Webb Space Telescope help observe visible light and infrared radiation from space objects.
• 😀 X-ray and Gamma-ray telescopes like Chandra X-ray Observatory study energetic phenomena like supernovae, black holes, and blazars.
• 😀 Radio telescopes like the Very Large Array detect radio waves from sources such as pulsars and blazars.
• 😀 Combining multiple observation techniques helps scientists uncover the mysteries of the universe, including galaxy formation and black hole properties.
• 😀 A blazar is a highly energetic type of active galactic nucleus, emitting intense radiation from the center of a galaxy.
• 😀 Blazars differ from other types of active galaxies because their jets are directed toward Earth, making them exceptionally bright.
• 😀 The most distant blazar, J041139, was discovered in 2024 with a redshift of 7, meaning its light traveled for 13 billion years to reach Earth.
• 😀 The discovery of J041139 provides insight into the early evolution of supermassive black holes and the formation of active galaxies in the early universe.
• 😀 Although blazars are powerful, there is no danger to Earth as they are located millions to billions of light-years away, and their radiation weakens with distance.

Q & A

What is a blazar?

A blazar is a type of active galactic nucleus that emits powerful radiation from the center of a galaxy. It is characterized by a relativistic jet of energy directed towards Earth.

How does a blazar differ from other types of active galactic objects like quasars and radio galaxies?

While blazars belong to the same class of astronomical objects as quasars and radio galaxies, they are distinct in that their relativistic jets are aligned directly towards Earth, which makes them appear exceptionally bright and energetic.

What is the significance of the discovery of the blazar J041139?

The discovery of the blazar J041139, which is the farthest blazar ever found, offers valuable insights into the early universe, showing that supermassive black holes and relativistic jets existed just 800 million years after the Big Bang.

What does a redshift of 7 in blazar J041139 indicate?

A redshift of 7 indicates that the light from blazar J041139 traveled for about 13 billion years before reaching Earth, meaning we are observing it as it existed when the universe was just under 800 million years old.

How massive is the supermassive black hole in the blazar J041139?

The supermassive black hole in blazar J041139 is estimated to have a mass approximately 700 million times that of the Sun.

What role does the Very Large Array (VLA) Sky Survey play in the discovery of J041139?

The Very Large Array (VLA) Sky Survey played a key role by initially identifying the blazar, which was later confirmed through multi-wavelength observations.

How does the discovery of blazar J041139 help scientists understand the early universe?

This discovery provides insight into the evolution of supermassive black holes, showing that such objects and their relativistic jets were already present in the early stages of the universe, helping to explain the formation and development of active galaxies.

Could a blazar ever pose a danger to Earth?

No, blazars are not a threat to Earth because even the closest known blazars are millions to billions of light-years away, so their radiation weakens over such vast distances, having no direct impact on Earth.

Why is the study of blazars important in the field of astronomy?

Blazars are important for studying high-energy phenomena in the universe, such as the behavior of supermassive black holes, relativistic jets, and the dynamics of early galaxies, providing key insights into the evolution of the cosmos.

What is the role of telescopes like Hubble, James Webb, and Chandra in studying objects like blazars?

These telescopes use different methods to observe various wavelengths of light, from visible to infrared and X-rays, enabling scientists to study distant and energetic objects like blazars in great detail. Hubble observes visible light, James Webb looks at infrared radiation, and Chandra observes X-rays.