Thursday, October 10, 2019

Could a habitable planet orbit a supermassive black hole? - MIT Technology Review

Interstellar holds a special place for science fiction fans. The film's executive producer and scientific advisor was Kip Thorne, a Nobel Prize–winning physicist who vowed that nothing in the film would violate the laws of physics and that any wild speculation would stem from science.

Various planets orbit Gargantuan. So NASA sends a number of missions to survey the planets in the hope of finding one that is habitable.

Much has been written about the scientific accuracy of the film, its depiction of black holes, and so on, most of it full of praise! 1 Million Habitable Planets Could (Theoretically) Orbit a ...www.space.com ...habitable - planets .html Given a million-sun black hole with an orbiting ring of nine sun-like stars, Raymond calculated that a million Earth-mass planets could orbit within the habitable zone in 400 rings, each holding ...!! The physicist Michio Kaku said it was the gold standard by which future science fiction films will be judged.

But one question has yet to be addressed—is it possible for a habitable planet to orbit a supermassive black hole at all? And today, we get an answer thanks to the work of Jeremy Schnittman at the NASA Goddard Space Flight Center in Greenbelt, Maryland.

Publisher: MIT Technology Review
Date: 2019-10-09T11:26:49-04:00
Author: Emerging Technology from the arXiv
Twitter: @techreview
Reference: (Read more) Visit Source



Not to change the topic here:

To-scale solar system now orbiting around CBEC

A new cosmic art installation on The Ohio State University campus represents our solar system and bridges the arts and sciences in an astronomical way.

“The Solar System to Scale” comprises 10 mixed-media kiosks that begin with a “sun” kiosk on Woodruff Avenue outside the Chemical and Biomolecular Engineering and Chemistry Building and end with a “Pluto” kiosk near the Chadwick Arboretum Learning Gardens on West Campus! Could a planet be habitable if it had an elliptical orbit ...www.quora.com/ ...habitable ...orbit Considering most planets (including Earth) have an elliptical orbit , the answer is "yes".However, I'm assuming you mean a significantly elliptical orbit (like many dwarf planets ) instead of a near-circular elliptical orbit (like Earth). An obvious...!! The spacing between the kiosks is a to-scale representation of each planet’s distance from the sun.

The installation was funded by a gift from alumni M. Andrew and Sandra L. Ross . The Rosses had their first discussion with the university about their vision to bring “The Solar System to Scale” to campus in July 2015. The idea came from Andy’s fascination with space as a child, he said, recalling how he looked up to the sky one night and asked his dad how close the nearest star was. Since that point, he’s never stopped trying to grasp the size of the universe.

Publisher: To-scale solar system now orbiting around CBEC
Reference: (Read more) Visit Source



Decommissioned Earth science satellite to remain in orbit for centuries - SpaceNews.com

LAS CRUCES, N.M. — A U.S.-European satellite that completed its mission earlier this month has been decommissioned but will remain in orbit for as long as 1,000 years, far beyond existing orbital debris mitigation guidelines.

Jason-2, a joint mission of NASA, the National Oceanic and Atmospheric Administration, the French space agency CNES and European weather agency Eumetsat, ended its mission to study sea-level height Oct. 1. The spacecraft, also known as Ocean Surface Topography Mission (OSTM), launched in June 2008 for a mission originally expected to last three years.

The decision to shut down Jason-2 came after telemetry indicated the spacecraft's power system was deteriorating! Can a habitable world exist that would orbit in and out of ...can - ...world-exist...The answer would be yes. As the planet orbits its star that orbits the center of the galaxy, the planet and its star could enter a nebula and pass through that nebula for thousands or millions of years and then emerge on the other side of the nebula .!! Earlier problems with Jason-2 in 2017 forced controllers to move the spacecraft into a slightly lower orbit and delete its excess propellant reserves to avoid any interference with its successor, Jason-3, launched in 2016.

logo
Publisher: SpaceNews.com
Date: 2019-10-10T19:50:47+00:00
Author:
Twitter: @SpaceNews_Inc
Reference: (Read more) Visit Source



An unexpectedly enormous planet is orbiting a tiny star | New Scientist

Astronomers have spotted an enormous planet orbiting a tiny star about 31 light years away. It is so big that it can’t have formed in the way that we think most planets do.

Juan Carlos Morales at the Autonomous University of Barcelona in Spain and his colleagues spotted the planet, called GJ 3512 b, using a technique called the radial velocity method . This takes advantage of the fact that as a planet orbits its star, the star moves slightly in a way that allows astronomers to determine the planet's mass and orbit.

Using more than two years of observations with the CARMENES exoplanet survey in Spain, the researchers found that GJ 3512 b is at least 46 per cent as massive as Jupiter and orbits its star once every 204 days. The star itself is only 12 per cent as massive as our sun – or about 126 times the mass of Jupiter.

Publisher: New Scientist
Author: Leah Crane
Twitter: @newscientist
Reference: (Read more) Visit Source



In case you are keeping track:

Most Extreme 'Hot Jupiter' Alien Planet Completes 1 Orbit Every 18 Hours | Space

Giant alien worlds known as hot Jupiters get scorchingly close to their host stars, and now astronomers have discovered the most extreme version of such planets to date — one that zips around its star in a little more than 18 hours, a new study finds.

This exoplanet's orbit is likely decaying enough for scientists to actually measure it over the coming decade, researchers added.

In the past two decades or so, astronomers have confirmed the existence of more than 4,000 worlds outside of Earth's solar system! Can smaller habitable planets (or moons) orbit a larger ...A planet and moon both habitable seems feasible to me, given the planet's orbit is in the stars 'goldilocks' orbital region. As an example, if an Earth/moon system were recreated except larger. So the Earth moon system was created early in our solar system by a large Mars sized collision with early Earth.!! These discoveries have revealed that some of these exoplanets , such as hot Jupiters, gas giants that orbit their stars closer than Mercury does the sun, are very different from those seen in Earth's solar system.

Related: The Strangest Alien Planets in Pictures
More: Extremely Hot and Incredibly Close: How Hot Jupiters Defy Theory

logo
Publisher: Space.com
Date: 2019-10-09T11:04:10+00:00
Author: https www facebook com spacecom
Twitter: @SPACEdotcom
Reference: (Read more) Visit Source



First exoplanet found around a Sun-like star

The discovery of the gas-giant planet — named 51 Pegasi b after its parent star, 51 Pegasi — came as a surprise! Could a habitable planet orbit a supermassive black hole ...www.reddit.com ...could _ a_habitable _ planet _ orbit ...r/cosmosreports: All about space explorations...Press J to jump to the feed. Press question mark to learn the rest of the keyboard shortcuts!! Gas-giant planets, such as Jupiter, are located in the outer parts of the Solar System. The prevailing theory was, and still is, that the formation of these planets requires icy building blocks that are available only in cold regions far away from stars. Yet Mayor and Queloz found 51 Pegasi b to be orbiting about ten times closer to its host star than Mercury is to the Sun (Fig. 1). One possible explanation is that the planet formed farther out and then migrated to its current location.

Figure 1 | The planetary systems of the Sun and of 51 Pegasi. a , In the Solar System, gas-giant planets, such as Jupiter, orbit far from the Sun. In 1995, Mayor and Queloz1 reported the discovery of 51 Pegasi b — a gas-giant planet that is much closer to its host star, 51 Pegasi, than Mercury is to the Sun. The orbital distances of the planets are given in astronomical units (1 AU is the average separation between Earth and the Sun). b , The sizes of all objects are shown approximately to scale.

Date: 2019-10-08
Author: citation_journal_title Nature citation_author M Mayor D Queloz citation_volume 378 citation_publication_date 1995 citation_pages 355 359 citation_doi 10 1038 378355a0 citation_id CR1
Twitter: @nature
Reference: (Read more) Visit Source



Happening on Twitter

No comments:

Post a Comment