Tal Alexander

black hole

The Missing Black Holes

22.06.2017

Space & Physics, Astrophysics, Theoretical Physics

Why do we not see midsized black holes in the Universe?

A small black hole gains mass: Dense cold gas (green) flows toward the center of a stellar cluster (red cross in blue circle) with stars (yellow); the erratic path of the black hole through the gas (black line) is randomized by the surrounding stars

All-You-Can-Eat at the End of the Universe

11.08.2014

Astrophysics, Particle Physics, Theoretical Physics

A new model shows how early black holes could have grown to over a billion solar masses

Prof. Tal Alexander

Prof. Tal Alexander

02.04.2012

Prof. Tal Alexander has been appointed Head of the Department of Particle Physics and Astrophysics (2012)

Zoloto | Shay Id Alony. Installation, painted wood, 2006

Black Hole Swing

12.09.2011

When two black holes get close, what are the chances they will meet and emit gravitational waves?

Stars pulled into the crowded perimeter of a supermassive black hole sometimes collide. Simulation of a collision between two stars.

Riding a Black Hole

01.05.2003

A ten-year study suggest the mass at the center of the Milky way is a supermassive black hole

Simulation of a collision between two stars. Simulations by Dr. Tal Alexander, Weizmann Institute of Science

Zooming Star Points to Supermassive Black Hole at the Center of the Milky Way

16.10.2002

The scientists tracked, for the first time, a star completing an orbit around a known unusual source of radiation (a...

Top Stories

Shedding Light on the Dark Hours

Credit: Coleen Murphy, Princeton University, Princeton, NJ

Cracking the Code of a Worm's Throat

“Eight Shining Examples of Excellence”

Burning Cancer’s Bridges

Press Releases

“Eight Shining Examples of Excellence”

The Weizmann Institute of Science Ranked among the World’s Top Ten Academic Institutions

A Discovery to Set Your Heart a-Knocking

Most Popular Articles

The Coin Toss Paradox

Can a game with “quantum” rules beat the odds?

One Protein, Two Programs

A cell’s decision to commit suicide involves an exchange of information between two suicide mechanisms

Israeli Researchers to Participate in European Commission Flagship

The European Commission has officially announced the selection of the Human Brain Project (HBP) as one of its two Future Emerging Technologies (FET) Flagship projects.