Tag

Gravitational Effects

All articles tagged with #gravitational effects

science1 year ago•3 min saved

Asteroid 'Apophis' Flyby Sparks Concerns of Earth Impact and Quakes

Asteroid 99942 Apophis, named after the Egyptian god of darkness, will pass close to Earth in 2029, potentially altering its surface due to Earth's gravitational pull. This interaction could cause seismic events and change the asteroid's rotation, offering insights into why some asteroids appear younger than expected. The flyby presents a unique opportunity for scientists to study Apophis in detail, as it will be visible to the naked eye. The research, led by Ronald Ballouz, is published in The Planetary Science Journal.

via ScienceAlert|

#apophis #asteroid #earth-flyby

science1 year ago•1 min saved

Asteroid 'Apophis' May Cause Quakes During 2029 Earth Flyby

In 2029, Earth will have a close encounter with the asteroid 99942 Apophis, which could experience an "asteroidquake" due to Earth's gravitational pull. This event might cause rocks and dust to shake off Apophis's surface, potentially altering its structure and rotation. Although Apophis poses no immediate threat to Earth, its proximity could lead to significant changes in the asteroid itself.

via indy100|

#apophis #asteroid #earthquake

science1 year ago•3 min saved

Asteroid Apophis to Experience Quakes During 2029 Earth Flyby

The asteroid Apophis, known as the 'God of Chaos,' is predicted to experience 'astroquakes' due to Earth's gravitational pull when it passes within 19,000 miles of the planet on April 13, 2029. This close encounter could cause surface changes on the asteroid, such as lifting boulders and altering its tumbling pattern. Although initially considered a potential threat, recent studies show a one in two billion chance of impact in 2029. NASA plans to study Apophis during its flyby to understand these gravitational effects better.

via Daily Mail|

#apophis #asteroid #earth

astronomy1 year ago•2 min saved

"Planetary Orbits Altered by Passing Stars"

Earth's orbit around the Sun is influenced by passing stars, affecting its climate and complicating paleoclimate studies. The gravitational tugs of stars like HD 7977 can significantly alter Earth's orbit, introducing uncertainties in paleoclimate conclusions. This challenges previous models linking Earth's eccentric orbit to events like the Paleocene-Eocene Thermal Maximum, suggesting that passing stars may have played a more significant role in shaping the planet's climate than previously thought.

via Universe Today|

#astronomy #earths-orbit #gravitational-effects

astronomy2 years ago•7 min saved

Gaia Mission Discovers Unprecedented Black Holes Near Earth.

The European Space Agency's Gaia mission has discovered a new type of black hole, with two members located closer to Earth than any other known black hole. The black holes, named Gaia BH1 and Gaia BH2, were discovered by studying the movement of their companion stars, which showed a gravitational influence from massive objects. These black holes are unique in that they do not emit any light and are only detectable by their gravitational effects. The discovery suggests that black holes in wider binary star systems are more common than previously thought, and Gaia's next data release in 2025 is expected to reveal more of these systems.

via SciTechDaily|

#astronomy #binary-star-systems #black-holes

astronomy2 years ago•3 min saved

Unprecedented Discovery: Closest and Unique Black Holes Found Near Earth

Astronomers have discovered two black holes, Gaia BH1 and Gaia BH2, that are the closest to Earth known and are orbited by stars at much greater distances than previously observed in other black hole-companion star pairings. These black holes are completely dark and were detected via the gravitational effect they have on their companion stars. The discovery of these two black holes challenges current theories about the evolution of binary star systems and implies that black holes in wide orbits are more common in space than binaries where the black hole and star are closer.

via Space.com|

#astronomers #astronomy #binary-star-systems

astronomy2 years ago•5 min saved

Gaia mission discovers closest-ever black holes to Earth.

Using data from ESA's Gaia mission, astronomers have discovered two black holes, Gaia BH1 and Gaia BH2, located respectively just 1,560 light-years away from us in the direction of the constellation Ophiuchus and 3,800 light-years away in the constellation Centaurus. These black holes are unique because they are much further away from their companion stars and do not emit any light, making them practically invisible. The discovery suggests that many more similar black holes in wide binaries are still waiting to be discovered, and Gaia's next data release in 2025 is expected to contain many more of these stars with mystery black hole companions.

via Phys.org|

#astronomy #binary-systems #black-holes

science-and-exploration2 years ago•5 min saved

Gaia's discovery: A new family of black holes

The European Space Agency's Gaia mission has discovered a new family of black holes, including the closest and second closest black holes to Earth. The black holes were discovered by studying the orbits of stars tracked by Gaia, which wobbled on the sky, indicating they were gravitationally influenced by massive objects. The new black holes are truly black and can only be detected by their gravitational effects, making them practically invisible. The discovery suggests that black holes in wider binaries are more common than previously thought, and Gaia's next data release in 2025 is expected to contain many more of these stars with mystery black hole companions.

via European Space Agency|

#astronomy #black-holes #gaia-mission

science2 years ago•1 min saved

Invisible Matter Slowing Star Movement Consumed by Black Holes

Scientists may have discovered indirect evidence that large amounts of invisible dark matter surround black holes, which could represent a major breakthrough in dark matter research. The team used stars orbiting black holes in binary systems as proxies and observed a slow-down in their orbits, concluding that the dark matter surrounding the black holes generated significant friction and a drag on the stars. Computer simulations of the black hole systems matched the predictions of the dark matter dynamical friction model, revealing that the observed rates of orbital decay were around 50 times greater than the theoretical estimation for binary systems lacking dark matter.

via Slashdot|

#black-holes #cosmology #dark-matter

science-and-astronomy2 years ago•3 min saved

Invisible matter slowing star movement may be devoured by black holes.

Scientists may have discovered indirect evidence that large amounts of invisible dark matter surround black holes, which could represent a major breakthrough in dark matter research. The team of scientists from The Education University of Hong Kong used stars orbiting black holes in binary systems as proxies to infer the presence of dark matter. The slow-down of the stars' orbits was the result of dark matter surrounding the black holes, generating significant friction and a drag on the stars as they whipped around their high-mass partners. The team's results help to confirm a long-held theory in cosmology that black holes can swallow dark matter that comes close enough to them.

via Space.com|

#binary-systems #black-holes #cosmology

science2 years ago•3 min saved

Invisible matter slowing star movement swallowed by black holes.

Scientists may have discovered indirect evidence that large amounts of invisible dark matter surround black holes, which could represent a major breakthrough in dark matter research. Dark matter makes up around 85% of all matter in the universe, but it is almost completely invisible to astronomers. The team used stars orbiting black holes in binary systems as proxies and concluded that the slow-down was the result of dark matter surrounding the black holes which generated significant friction and a drag on the stars as they whipped around their high-mass partners.

via Livescience.com|

#astronomy #black-holes #cosmology

astronomy2 years ago•2 min saved

Invisible matter slowing star movement may be devoured by black holes.

Scientists may have discovered indirect evidence that large amounts of invisible dark matter surround black holes, which could represent a major breakthrough in dark matter research. The team used stars orbiting black holes in binary systems as proxies and found that the slow-down of the stars' orbits was the result of dark matter surrounding the black holes, generating significant friction and a drag on the stars. The team's results help to confirm a long-held theory in cosmology that black holes can swallow dark matter that comes close enough to them, creating a "density spike" in their immediate vicinity that can subtly influence the orbit of surrounding objects.

via Yahoo Life|

#astronomy #binary-systems #black-holes