Weekly Space Hangout - May 19, 2017: Eric Fisher of Labfundr

TL;DR

Scientists use the LIGO and Hubble Space Telescope to make intriguing discoveries about black holes, exoplanets, and dwarf planets.

Transcript

okay we should be live right now greetings hello world hello world in theory but we need people to say that they see us we're like one of that Quantum thing we don't live and not live we we don't exist until somebody makes an observation of US ah all right so as we were preparing for this I was just scrolling through uh the news and I have to say I... Read More

Key Insights

• 🖤 The formation of intermediate-mass black holes remains a mystery, but the study of their spins through gravitational wave detection can help scientists determine their origins.
• 💥 Moons around dwarf planets hint at a history of collisions and mergers, shaping the satellite systems we see today.
• 💁 The diversity of exoplanet compositions challenges our preconceived notions of how planetary systems form and evolve.
• 🤩 Monitoring events like the Bagian star's unpredictable dips provides valuable insights into the dynamic nature of celestial bodies.

Questions & Answers

Q: How do scientists use LIGO to study black hole formation?

LIGO detects the gravitational waves produced by black holes merging and analyzes their masses and spins, providing insights into the formation and evolution of these massive objects.

Q: What can the discovery of a moon around a dwarf planet tell us?

The presence of a moon around a dwarf planet suggests that collisions and mergers of smaller objects were crucial in the formation of moon systems in the outer solar system.

Q: How does the composition of the exoplanet HAT-P-26b challenge previous assumptions?

HAT-P-26b's composition resembling Jupiter, despite being closer in size to Neptune, suggests it formed closer to its star and at the end of the planet formation process, resulting in less material and a different atmospheric makeup.

Q: Why can't we detect all black holes using LIGO?

LIGO is sensitive to certain black hole mergers, but it cannot detect all black holes in the universe. It relies on the gravitational waves produced by merging black holes, requiring specific conditions for detection.

Summary & Key Takeaways

• LIGO detects gravitational waves from black hole mergers and measures the masses and spins of the black holes, shedding light on the formation and evolution of these massive objects.

• The presence of a moon around a large dwarf planet, O10, supports the theory that collisions and mergers of smaller objects played a significant role in the formation of moon systems in the outer solar system.

• The discovery of a warm Neptune-like exoplanet, HAT-P-26b, with a composition similar to Jupiter challenges previous assumptions about the relationship between the size of a planet and its atmospheric properties.