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This is Scientific American's 60-second Science, I'm Steve Mirsky.
Justin Verlander of the Houston Astros will start tonight's Major League Baseball All-Star Game for the American League.
He's in the news for more than that, though.
Monday, he told ESPN that the huge rise in home runs this season is due to the fact that the 2019 baseball is what he called "a f-ing joke."
Many other players and commentators have questioned whether the ball is "juiced" ― that is, made so that it travels farther and faster.
"So, however they are making or creating the baseballs... they're coming up with a rounder baseball."
Sports data scientist Meredith Wills.
With a doctorate in astrophysics, her first studies were in publications like the Astrophysical Journal and Solar Physics.
But her most recent research, on the 2019 baseball, appeared June 25th in the online sports publication the Athletic.
So how do you make a baseball that's rounder than other baseballs?
Wills got her hands on 39 Major League baseballs used in 2019.
Compared with last year's ball,
"The laces are thinner... the leather is substantially smoother...
any one of these changes will make the aerodynamics of the ball better, they will decrease the drag.
So the way to think of it is that the ball doesn't slow down as quickly when it's traveling through the air,
which means that it stays faster longer, which means it's able to travel farther."
这里是科学美国人――60秒科学系列,我是史蒂夫・米尔斯基。
休斯敦太空人队的贾斯丁・韦兰德将为今晚的美国职业棒球大联盟全明星赛开场。
不过,有关他的新闻可不止这些。
他在周一对ESPN表示,本赛季本垒打数量的大幅增加是因为2019年使用的棒球是个“该死的笑话”。
许多其他球员和评论员也质疑棒球是否“被榨汁”,以便让其飞得更远更快。
“所以,无论他们如何制作或创造棒球,他们都在设计更圆的棒球。”
体育数据科学家梅雷迪思・威尔斯说到。
威尔斯拥有天体物理学博士学位,其早期研究发表在《天体物理学杂志》和《太阳物理学》等刊物上。
但她最近关于2019年棒球的研究于6月25日发表在在线体育新闻平台Athletic上。
那如何制作比其它棒球更圆的棒球呢?
威尔斯拿到了2019年美职棒使用的39个棒球。
与2018年的用球相比,
“2019年使用的棒球缝线更细、皮革也光滑很多,
这些变化中的任何一项都会将改善棒球的空气动力学,并减少阻力。
所以我们对此的想法是,棒球在空中飞行时,减速的过程没有以前那么快,
这意味着其快速飞行时间更长,飞行距离更远。”
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