‘Impossibly big’ black hole not as big as previously calculated

The video discusses the black hole LB1, initially claimed to be 70 times the mass of the sun by a team led by Chinese astronomer Liu Jing Fung. This claim was challenged by two independent studies, which argued that the original team misinterpreted spectral data. The new studies suggest that LB1 is more likely a sun-sized black hole, after accounting for emissions from its companion star. The analysis involved using China's LAMOST telescope to detect H alpha line emissions and applying the Doppler effect to infer mass.

What was the initial claim about the size of black hole LB1?

• It is 20 times the mass of the sun.

• It is the same size as the sun.

• It is 70 times the mass of the sun.

• It is smaller than the sun.

What did the independent studies find problematic about the initial claim?

• The black hole's color was wrong.

• The black hole was not moving.

• The use of an incorrect telescope.

• Misinterpretation of the light data.

What method did the initial team use to infer the mass of LB1?

• By measuring its temperature.

• By observing its color.

• By detecting H alpha line emissions.

• By calculating its distance from Earth.

What did the new studies suggest about the size of LB1 after considering the companion star's emissions?

• It is twice the size of the sun.

• It is not a black hole at all.

• It is likely a sun-sized black hole.

• It is larger than initially thought.

Who were the authors of the new studies challenging the initial claim?

• Liu Jing Fung and team.

• European Space Agency researchers.

• Al, Badry and Quatarch.

• NASA scientists.