What is a black hole?
世界初 ブラックホールの輪郭撮影に成功 | NHKニュース
ブラックホール - Wikipedia
How do you explain a black hole to your child?
Why is it called black?
What does it mean to be "the black sheep in the family"?
Do you like to wear black clothes?
世界初 ブラックホールの輪郭撮影に成功 | NHKニュース
ブラックホール - Wikipedia
How do you explain a black hole to your child?
Why is it called black?
What does it mean to be "the black sheep in the family"?
Do you like to wear black clothes?