Connect with us

News

Mars could have a Leap Day like Earth but way more complicated

A view of Mars. Credit: NASA/JPL-Caltech

Published

5 years ago

on

February 29, “leap day”,  is an oddity on the calendar that occurs every four years in an attempt to sync up the Gregorian calendar (the calendar most of the world uses to keep time) with Earth’s rotation around the sun.

One calendar year on Earth is 365 days long; however, the Earth actually takes 365.2422 days to lap the sun. That puts the planet roughly a quarter of a day behind at the end of each year.

To maintain consistency and ensure the seasons line up each year, an extra day was added to the already short month of February — a modification that happens every four years. But even this doesn’t fully solve the problem; additional tweaks are needed.

For instance, if a year is divisible by 100, there’s no extra day — unless the year is divisible by 400. That means that 1700, 1800 and 1900 did not have a leap day, but 2000 did. This adjustment ensures that Earth is as close as possible to the same point in its orbit in consecutive calendar years and keeps our seasons inline.

Advertisement

Unsurprisingly, Earth is not the only planet that needs leap days. The phenomenon could occur on other planets in our solar system as well as those around other stars. That’s because you can’t fit an exact number of spins into one trip around the sun for any planet. There’s usually going to be something left over. Leap days on other worlds, such as Mars,  could be more complicated than those here on Earth.

One year on Mars lasts for approximately 668.6 Martian days. (A Martian day is called a sols and equals 24 hours, 39 minutes, and 35.244 seconds.) Future inhabitants might decide that a year on the red planet will be described as 668 days. How do we adjust?

Over the decades, many different ideas for the Martian calendar have been proposed. The most popular one, called the Darian calendar, was created in 1985 by Tomas Gangale.

According to Gangale, the Martian calendar would feature 24 months, each named for the Latin and Sanskrit words for the constellation of the zodiac, like Sagittarius and Dhanus, and so forth. The first five months in each quarter would have 28 Martian days (or sols), with the sixth having only 27. Even-numbered years would total 668 days and odd-numbered years would have 669. The exception to that rule: even-numbered years that were divisible by 10.

An artist’s concept depicts astronauts and human habitats on Mars. Credit: NASA

Another option was proposed by Michael Allison, a retired NASA scientist. In his version, the Martian calendar would have 668-days divided into 22 months, each totaling 30 or 31 days, similar in fashion to Earth. To make sure the seasons lined up, all years divisible by five will have three leap days, bringing the total to 671.

So which of these calendars do scientists use to keep track of time on Mars? Currently, none.

Advertisement

Instead, they use two systems to keep track of time: one counts the number of Martian days since the start of a mission, and the other keeps track of where Mars was in its orbit at that time.

Right now scientists don’t care if the seasons line up perfectly with the calendar, but that may change when you add humans into the mix. NASA and other space agencies around the world have their sights set on Mars. Once humans land on the red planet and spend significant time there, we are going to need a common calendar to keep track of seasons.

Related Topics:

I write about space, science, and future tech.

Advertisement
Comments

Elon Musk

Tesla officially launches Robotaxi service with no driver

Tesla launches its driverless Robotaxi in Austin, marking the first time the company has offered its ride-hailing service anywhere in the world.

Published

1 hour ago

on

June 22, 2025

By

Credit: Tesla

Tesla has officially launched its Robotaxi service platform with no driver in Austin, Texas. This is the first time Tesla has allowed driverless Robotaxis to pick up members of the public and take them around via the ride-sharing service the company has been developing for several years.

Teslarati had a first-hand look at the launch of the Robotaxi service in Austin, as we are part of the Early Access group, which is a limited group of people that will be able to hail a driverless Model Y in the geofenced area in Texas.

The Robotaxi platform is currently geofenced in a small portion of South Austin. It is roughly thirty minutes from end to end, and Tesla’s strategy is prioritizing safety through a number of safeguards that are implemented in this early program.

There is a fixed price of just $4.20 for any ride, regardless of duration, at this time. This will not always be the case, however. When a wider customer base is allowed to hail Robotaxis, ride fares will vary on things like travel distance, length of trip, and potentially time of day.

The first rides kicked off at around 2 p.m. local time in Austin. They are confined to the back row of the Model Y, while a Tesla safety monitor sits in the passenger seat. Passengers will have their personal media and streaming settings available to them as the car will sync with their driver profiles.

Rides are requested through a Robotaxi addition on the regular Tesla iOS app:

The safety monitor is only there to ensure things go smoothly with each ride. They do not have pedals or a steering wheel on their side. The car is doing everything during these Robotaxi rides.

The big takeaway from Robotaxi’s launch is that Tesla will begin generating additional revenue through this new stream. As concerns over demand and annual growth rate continue to take focus from doubters, Tesla’s continuous rollout of the Robotaxi fleet will expand potential revenue opportunities, potentially creating billions upon trillions of dollars in value.

This is something Tesla permabulls like Cathie Wood of ARK Invest and Dan Ives of Wedbush have talked about for years: the launch of a driverless Robotaxi fleet that generates new income streams for Tesla.

Advertisement
Continue Reading

Elon Musk

First Look at Tesla’s Robotaxi App: features, design, and more

Tesla is using a Robotaxi section of its normal smartphone application to enable access to driverless vehicles roaming around Austin.

Published

2 hours ago

on

June 22, 2025

By

Tesla has officially launched the Robotaxi platform to a limited number of people, giving them the ability to ask for a ride from a driverless Model Y in Austin, Texas. But how do you hail a ride?

Through the Tesla Robotaxi app, which officially launched on June 22 as the company initiated the first rides for non-employees, people can request rides from driverless cars that are traveling around Austin. Teslarati gained access to the app as we are members of the Early Access Rider program.

There are only a very limited number of vehicles operating within the fleet currently, as Tesla has said the number is between 10 and 20 vehicles.

Tesla is using a Robotaxi section of its iOS smartphone app for the launch, confirming what the company said prior to the program’s maiden voyage: there would not be a separate app for the Robotaxi.

First Look at the Robotaxi App

The Tesla Robotaxi app, similar to the official Tesla App, features a simple interface that should be familiar to anyone who has used a ride-sharing app in the past. Downloading the app brings users to a sign-in page, which features a Tesla Model Y Robotaxi as a header image. Users can then log in or create an account to access the service.

Advertisement

A Clean, Simple UI

Upon logging in, users are presented with a clean user interface that allows them to select a destination and pickup point. Upon booking, users are provided with a real-time update on when their Robotaxi will arrive. Users could also select some settings for their upcoming ride, such as their preferred temperature in the cabin.

Smart Suggestions

If there is one evident thing about Tesla’s Robotaxi App, it is the fact that it is smart and designed to make driverless ride sharing services feel as normal as possible. While waiting for their ride, customers are presented with a number of tips that should help them understand their robotaxi better.

These include tips on how to use the Model Y’s door handles, as well as information about the vehicle’s light signals. The app also includes smart suggestions on destinations that riders can visit using their Robotaxi. These include cafes, restaurants, parks, shopping centers, and other pertinent locations.

Credit: @BLKMDL3/X

Cybercab Theme

Another thing that is evident with the Robotaxi App is its Cybercab-inspired color theme. This is evident from the login page, which already features the golden hues of the dedicated two-seater autonomous car. The golden Cybercab color theme is used to great effect inside the app itself as well.

No Tips, at Least for Now

As observed by Tesla owner-enthusiast @BLKMDL3, Tesla is not accepting anything more than the service’s flat $4.20 rate per ride for now. If customers wish to leave a tip for the service, they would be presented with a page featuring Tesla’s hedgehog mascot saying “Just Kidding.”

Tips will likely be an option in the future, but for this stage of the Robotaxi rollout, it appears that the service really will follow a flat rate system.

 

 

Advertisement
Continue Reading

News

Watch Tesla’s first driverless public Robotaxi rides in Texas

Tesla’s first driverless Robotaxi rides for non-employees are starting with the first drives beginning today.

Published

3 hours ago

on

June 22, 2025

By

Tesla has finally launched its Robotaxi platform to members of the public for the first time in Austin, Texas.

The Tesla Robotaxi platform is a driverless ride-hailing service that will enable people to use their cars for passive income as they will ride around, find riders, and drive them to their destinations in exchange for money. For right now, Tesla is using company vehicles, the Model Y specifically, and has opened up rides to a small number of people who are a part of the Early Access Program.

Teslarati is a member of the Early Access Program, as we were invited to Austin for the launch. We have gained access to Tesla’s new Robotaxi app, which lies within the main Tesla iOS app, and we are able to use the Robotaxi fleet during the Early Access Program.

The first rides are already occurring as Tesla launched the platform at around noon local time in Austin on Sunday:

The video shows that Tesla’s initial Robotaxi rides are being quite cautious. Currently, the Robotaxis can only travel within a geofenced portion of Austin. This area will eventually be expanded.

Advertisement

For the time being, Tesla is keeping a safety rider in the vehicles with occupants, but they do not take up the driver’s seat. Instead, they are sitting in the passenger’s seat. This is simply a safety precaution that Tesla is using to keep Early Access riders safe, although there are ways riders can alert Tesla of any issues.

In the initial communication Tesla sent to members of the Early Access Rider program, the company said the Cabin Camera would be deactivated for the duration of their rides, but can be used if the rider needs support. Additionally, the in-cabin microphone will be deactivated, but can also be used to get in contact with support if there are any issues during the ride.

We have seen a variety of different Robotaxis rolling around Austin for the past several weeks. The company has been testing the vehicles in a very limited way for the time being, and it only has between 15 and 20 Robotaxis in the city for the launch. This number will slowly grow over time.

Continue Reading

Trending